Yes it's good that GPUGrid is starting to develop applications for AMD GPUs, however this test one is not really a true GPU application but a modified multi threaded CPU application with some GPU assist.
In the way it works it's currently similar to the horror GPU application that WCG developed a while ago. Efficiency and performance depends on CPU as much as GPU, making the use of a powerful GPU a waste of resources. It's a shame that they are starting so far behind the eight ball and can't get some help from the developers at Folding@Home. The Folding AMD GPU app has been developed over many years, is very efficient, and uses almost no CPU resources.
At least they're having a go, not very promising so far but hopefully one day they'll get away from this silly MT CPU concept and be able to develop a real AMD GPU application.
Oh, and one that pays somewhat more than 550 credits per day for the use of a GPU and 7 CPU cores.

Yeh, looks like you're certainly going to town on GPUGrid on your nVidia cards, so no worries there, haha. An excellent contribution.
