Rush tables are fricking awesome.....agree...play premium hands only or if with a drawing hand, only play if you hit your draw (NOT if one of your cards happens to hit top pair off flop)
You will be surprised how many people play mediocre hands even though they can be dealt another immediately after folding.
I have lost $100/hand when I'm all in w/ KK vs. AA or even sucked out when my AK loses to AT or something....but overall, you can feast on the action junkies.