No, just the opposite. Graphic intensive programs are going to be doing a lot of sprite drawing, especially when they have to draw to 2 layers, so those are going to be sped up and the screen is only updated at the end of all that. On the other hand, if you only draw a few sprites, but still update the screen constantly, you won't get much of a speed increase using Full since most of the cycles are being spent refreshing the screen which takes a fixed amount of time regardless of speed.