Tony,
Yes, but in the US, I think in the UK as well, the East Front is pretty much dismissed by the popular culture and this show was aimed at popular culture.
Most Americans think that the USA won WWII with some help from the Brits. They have no comprehension of the scope or significance of the Eastern Front.
In my opinion, Russia defeated Germany, with support from the USA and the UK and its Commonwealth. The USA defeated Japan, and had some support from the UK and its Commonwealth.
What D-Day really accomplished wasn't defeating Germany, that was already inevitable, but rather allowing the western part of continental Europe to remain free of Soviet control.