So, what you really should be doing is trying to play more combined arms, rather than having this "central element" you are talking about.
That's what he is trying to do, but hes just expressing how it seems to be a little harder when playing as Russians is all. Though I may be reading him wrong.
I'd kinda mirror that observation. I haven't played enough Germans to really get a good feel for them but I get a sense that their basic units are just a little easier to use, and as an army, the composition is a little easier to do. Its not a complaint, just an observation.
Russians have some extremely powerful units (snipers and SU-85s) but they are very specialist, and you really need to think about the units you use to support them.
From what I've read on here and other forums, it looks like the vast majority of Russian 1v1 players have found a functional build order and army structure that gives them the best chance to win. Conscripts > T1 (clown car and snipers when possible) > T4. Anything outside of that is really really hard to make work. 2v2+ is even hard to find any kind of balance.
Thats not to say that it other strats wont work, and the latest patch has helped T3, but they are harder to make work is all.