I'm curious what some longer term/more experienced players think the percentage of players using PT is at different limits? 25%, 50%? Also, do you ever find yourself using higher level thinking based on your own personal HUD? For example, if you're card dead and just haven't played as many hands/made as many preflop raises as you would usually, do you ever think to yourself "The other players are using PT, they see I've been very tight, they're likely to believe if I raise that I have a strong hand" and then try to steal more and/or expand your preflop raise range? Does this make sense?

It depends how aware of things your opponents are. If they're playing 24 tables it doesn't matter if you're card dead today; if they have 10k hands on you and those hands show you as a 14/10 they're going to play you like a 14/10 every single time. They just don't have time to notice the nuances of the table.

I see... I've only just started playing online again and using PT. Obviously I'm only familiar with small database sizes... Thanks.