Well, even with the plan as it had stood, the German army could have taken moscow before the winter set in, except hitler was more concerned with the POW numbers-but the surrounded pockets of demoralised, starving men with little ammo could have been held by small holding forces while the main bulk of German forces sped onwards to Moscow, and no matter how many peasents grabbed up by the soviets were put in their way, they would have won-even in the historical scenario my Great Uncle sat in a bus station just a few miles from the kremlin ("the bus naver came", as he ofton said...) so imagine what they could have done without the winter setting in when they first began the assault?