Probably not, unless it is exaggerated enough to cause stress to other parts of the body. I've personally never seen a problem in dogs that were slightly high in the rear. And the success of the BC and Cheetah speak for themselves. In stance perpendicular to the ground. The stifle nearly perpendicular to the hip.
Hocks well let down, broad and muscled.
Seen from behind they should be perfectly parallel. Dewclaws not desirable. Toes arched and well closed. Pads thick and elastic. Nails dark and strong.