Wow.. Are higher level buyins and plays so sophisticated that someone with 100BB is willing to fold a 10BB shove on a blind war? And on a bounty tourney???
My wild guess, from micro experience though, is that since he folded that, he probably had some pretty crap hand, something like offsuite 26, 27, 28, 29, 36, 37, 38, 39, 49 etc that would fold even if you min raise him or even if you shoved on the flop after you had limped. The only case your aces would get action against those type of hands is when your aces are cracked.
I think with 10bb blinds shoving preflop on the sb is more polarised and opponent can call you with more hands than shoving on the flop. I believe you are just result oriented cause your aces got no action, but in the long term I think you would get more value from shoving pre than hoping your opponent to connect postflop.
On the other hand, if higher buyins means more thinking players, when a 10bb stack shove on someone with 100bb, probably he aint doing it to steal blinds, he aint
bluffing and he is expecting to get called, so his range is pretty strong.. Well, I confused myself, I dont know. All I know is that on microstakes, shoving is definately the best option there.