[rando]

Yeah I think turn checks around indicate either nothing or a rock-crusher employing the same waiting game (and it would be hard to determine which), while a suck bet, if raised or just called, offers a lot more definition of your opponents' range. A suck bet may have given him a read of "I'm probably good for low, he probably has an ok flush, and hey if he doesn't (i.e. set or similar) I can still Q, 7, or 2 the river." Only the 2 would have cost you money, while he could make a big mistake when the 7 falls if you played the river deceptively.