Speaking of River CRs... 109fo 6max

Quick line check in a not so interesting spot. Villain was 20/10/2.5 over 80ish hands... not sure if that even factors in.

Blinds at 40/80. I have KdQd in the CO.

UTG+1: RAZITUP2007 (16,000)
CO: KramerTM (4,430)
SB: redge3068 (5,100)
BB: PAYME100000 (3,160)

UTG+1 opens for 160, I call right behind, BU folds, blinds call.
Flop comes 9s3cJc. Checked around.

Turn comes 7h. Checked around again.

River comes Qs. Checked to me. I bet half pot (320) figuring tons of hands will pay me off. UTG+1 makes it 960 and I fold.

Again, it's simple, but I used to always call this and chalk it up to "if he can check that river with a straight, more power to him," never really sensing it was right.

So who wins? The new me or the old me?