I'm just gonna lob in a grenade and run. What if large file sizes actually mean the developers are evidently inefficient, which in turn doesn't bode well for the actual gameplay? You should be looking for tiny games where the developers are smart enough to think "let's try and save bandwidth and hard disk space" and capable enough to achieve it, because it means they've probably also achieved what they wanted to with the game itself.
Everything you've ever believed is a lie.
#9262108, By *Official* XBLA thread