its definetly not candy.
in newer games, textures can be HUGE, and all those textures need to be stored in memory, wich is much faster if used right there on the video card.
You can notice up to 50% improvements in Unreal Tournament 2003 if you use large textures, going from 64mb to 128mb. And the visuals are stunning.
For AH however, it doesnt matter. I dont think it takes even 32mb of video memory.