[soah]

I do that sometimes too, but I feel a lot better about if if I've seen previous hands where my opponent has checked behind on the river with TPTK/overpairs on relatively safe boards. Of course, it would also be helpful if I've seen my opponent minraise the flop with top pair... so I guess what I'm saying is, some opponents will only do this (the preflop/flop/turn action) with a set, but others will do it with less.

I've only logged a couple thousands hands of 2/4 six-max at party but from what I've seen, most people have got a big hand when they get their $400 in the pot. So without any specific read to the contrary, that's what I've got to assume in this case as well...