expert bluff river call? what level of thinking is he on?

[rsxpunk]

Full Tilt No-Limit Hold'em, $1 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

BB ($147.50)
UTG ($31.25)
MP ($129.15)
CO ($75)
Button ($53.25)
Hero ($121.10)

Preflop: Hero is SB with 4[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/heart.gif[/img].
<font color="#666666">3 folds</font>, Button calls $1, Hero completes, BB checks.

Flop: ($3) T[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/spade.gif[/img], J[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, BB checks, Button checks.

Turn: ($3) 5[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, BB checks, Button checks.

River: ($3) Q[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">Hero bets $23</font>, BB folds, Button calls $23.

Final Pot: $49

Results in white below: <font color="#FFFFFF">
Hero has 4s Kh (straight, ace high).
Button has 2s Qs (one pair, queens).
Outcome: Hero wins $49. </font>