Interesting comment on my play by a solid player

[HammerinHank]

My regular Bay 101 20/40. The details of the hand matter less than the comment by a prop. I hold 68s in the bb and get a free play in an eight way pot. Flop comes 579 r. I flop the nuts and bet. Loose player UTG shoots me a look just calls, as do 4 others including a solid prop on the button. UTG has been rushing and taken the "any two while I'm rushing" attitude. I expect him to bet the turn and go for the CR. Turn is checked through, Doh. I bet the river and get called by two players including the button. UTG questions my turn check and I tell him I thought he would bet the turn. The button then says "He (meaning me) is most dangerous when he checks. It doesn't mean anything when he bets." I have played many many hours with this prop and we both know each others game well. What does this comment indicate about my game?