I don't use physical pressure myself, but I do use forms of non-physical pressure and I'm constantly aware of how my pressure affects dogs. Even when we don't think we are, we're often applying pressure to dogs. Like I said, even an eye glance at a dog could be pressure, depending on the dog. I do also pay close attention to each dog I work with with pressure, and I am sure to never put the dog in a situation where it feels anxious or fearful. That's why I'm a huge fan of understanding pressure, because you can really relieve a LOT of anxiety in dogs just by backing up and giving them a bit of space (a key part in desensitization work!) to feel comfortable in.
You'd be surprised to know how you can teach dogs to repond to pressure. For instance, with Poker, I have taught him that quite subtle movements (not even really a step forward) can make him move his body and shift his balance. I slight movement to the right will cause him to shift back a bit and to the left. A slight shift to the left will cause him to do the same to the right. If I back up, I'm allowing him momentum forward. This would sound quite controlling, until you realize that the context is simply to teach him to free stack and to get him to set himself up in the proper stance so I can reward him for the desired behaviour. All the while he is happily working with me, there is no fear or anxiety involved. I have a video clip of doing just that, I'll see if I can get it uploaded to demonstrate it.
My girl Gaci has an AMAZING drive for tug. So I've been taking advantage of that to improve her wait and her down/sits at a distance, as well as teaching a "Stop/freeze" motion (for the record, a clicker was not used at all, for any of this! Except to have taught the sit/down/wait to begin with. The bite cue, the release cue, the stopping cue, all done via means other than a clicker! 
What, you say? I do thinks without a clicker?!?!?!). Anyhow, Gaci is VERY driven and in the beginning she used to jump the gun and begin running before I cued her release, because she was so anticipating that bite. All I needed to use to work on that was the use of minor pressure. When she bolted forward, I simply stepped TOWARDS her, with my hand out like a traffic cop (this has become the cue to freeze if she's moving towards me, which we're still working on). In the beginning she came up very close to me before she would stop, and I would have to take a few steps towards her, but now if she jumps the gun, which is getting less and less often with practice (you really have to see her to see how drivey she is, I think she could compete with any SCH dog in that area...lol), and now she will stop almost automatically and resume the position I had asked of her. Rather than view it as an aversive, it has simply become a cue to "freeze and resume position". There is no fear, no anxiety, no withdrawal or avoidance, just an understanding that my movement INTO her space signals that I want her to do something to alter her behaviour, in this case cease forward momentum. I also have videos of this so I'll find them and upload them for you so you can get a visual of how I use pressure to alter behaviour.
So yes, I do use pressure (for me it's mostly the occupation/relinquishing of space, but there are likely other examples), but I don't use it as an aversive, and if a dog did find it aversive, I would be very cautious in using it to likely not using it at all (applying it, that is). Like I said, I'm quite aware of pressure in the sense that I'll also very happily back OFF of a dog to relieve pressure if the dog is telling me that it is feeling pressured in a negative way, as for me the dog's comfort and trust is always the forefront of any work that we do.
I'll be the first to admit that pressure is something that I haven't always been aware of, so I'm constantly learning about it and how I wish to define, and to what extend I use it, in my work with dogs.
Some dogs tolerate pressure very well and use it as a building block to better communication and the desired behaviour. In fact, I know some dogs that work very well on the concept of pressure because I do think it's something they deal with naturally within familial units (ie other dogs). I think dogs understand it quite well the idea of pressure, and I think one benefit of humans understanding pressure is that it can become clear communication to a dog.
When a dog knows that it can relieve pressure quite easily, they actually experience very little stress. It is those dogs who can't avoid pressure, can't find a way to relieve it, or can't communicate their need for less or who are overpressured that end up suffering from it. And humans who understand pressure in terms of dogs can have a lot better success in working with canine behaviour if they know how to remove pressure from a dog, especially in working with dogs with fears, aggression, etc. This is a working hypothesis for me, and I'm sure that I will change it the more that I experience it. Perhaps I'll clarify some points, or drop some points because I feel they are incorrect. But I think this is an interesting concept that I'm really looking forward to delving into.