(100+9) Facing an UTG limper

Situation: 6 handed, 75-150 blinds, me: 1375, UTG: 2600

Play: UTG limps, 2 players fold, I push all in (1375 total) w/ 8 [img]/images/graemlins/spade.gif[/img] 8 [img]/images/graemlins/club.gif[/img] from the button, blinds fold, UTG thinks and eventually calls w/ A [img]/images/graemlins/heart.gif[/img] Q [img]/images/graemlins/spade.gif[/img]

Analysis: UTG seemed fairly weak and had limped several times from early position in the tourney, though he did not look to be a complete donkey (he did not show any of the hands). His range of hands seemed to be fairly large, so I felt confident that I either he would fold, I had the best hand, or at worst, it would be a race. My question is not so much related to my play (I like my push here; if you disagree, please explain), but to his play. Does anyone see any advantages to his limp in this situation? He may get a player to push with a weaker hand, but I do not think A Q is strong enough to slow play here. Your thoughts?

Also, I am new to this forum, so if you have any suggestions on the format of my post, please let me know. Thanks.