The last game I played where pings meant anything at all, was CS, and my ping I'd get at vert's server would get me kicked out. You guys probably wouldn't even be allowed to connect. Being the HPB isn't a good thing. Timing is extremely important for me, and when I ping 150-200, my timing is completely turned on its head and is a great disadvantage.
I play VERY few online games, so I am used to there not being lag, especially not variant lag. So when my shots miss or my tongue doesn't hit a survivor when it should've, that completely screws up my play. I don't like being stuck in glue. It's not my best when outside factors are inhibiting aspects of play. I see 3x less ping as an advantage. I see mine to be a disadvantage. Like that sliding bar of stars in Street Fighter for damage.
You say you compensate, which is wonderful. I can't. It completely makes things play in an alternate way opposed to the normal for me. It turns me from ok to completely shitty. It's even worse on campaign; I have no idea how Pop managed to go thorugh expert with 300 ping, zombies destroy my melee tries at half that.
Doing several techniques gets easier to practice with a stable, low ping server. 40 in the same server is great deadstop practice. Playing around 80 or so with west coasters, then coming into the 40 one where I get 130 (instead of 80) adds another layer of practicing to get it. And I'd only be practicing for that one server (I'll leave any server that puts me over 120). So when I play at other lower ping server, my timing is completely off, pretty much to the point that it's going to be one of those lucky to pull off's. I don't really like having to re-learn a technique every time I go to/from a server.