surfaces are native to the GPU while objects are on the CPU, soo while surfaces ARE faster you still have to be careful about resources 
Good point. I have a GTX 260 and my CPU is a dual core 3.11 ghz, so I tend to throw as much weight at the GPU as I can, since my bottleneck is clearly my CPU. Game Maker seems to hog the CPU more than the GPU anyway (in my experience).
