They would have accepted German leadership in a free Russian state, but they would no more have accepted German rule then Poland would have even had the Germans treated Poles like people and not animals. But then again, the Germans then were the Nazis (well the leadership anyways) and as such they wouldn't have been themselves if they treated the untermensch north and east slavs like human beings.
3 million Soviet soldiers surrendered in the first 4 months of Barbarosa. They figured they were being liberated from Stalin. By the end of 1941, 2 million of them were shot, starved or worked to death.