its often harder to build a nice pot if you dont start pumping til the turn. a lot of people are still very scared of flat flop, re-raise turn i think and most people don't do this as a bluff at these stakes.

it looks like the type of flop that doesnt hit THAT many really strong hands, it often hits draws though and if you raise flops with draws its great to do it with monsters too. I see people stacking off on these flops with over pairs all the time.