sets are probably the hardest hand to read from the opponent. unless you know the opponent very well i don't think you can possibly tell if someone's flopped a set. after all, they might be reraising with overpairs, TPTK, 2 pair, a draw, so many things.

but if there's anything, if you bet the pot, and they reraise you double, most of the time this is telling you they have at the very least TPTK. if they call flop and turn, you should be worried about being slowplayed. but at this point you're pot committed and screwed anyways if you fold.