This is a very subjective issue. In live poker I have seen some of what they talk about -- but it's rare. I have read the tells books -- and actually tells mostly come from bets.
A strange bet out of postion for example.
Getting played back at sends warning signs.
Now i am just a tourney NL player -- These days with all this aggression, you really have to use position, but I have noticed in live play people have been softening up.