Having (from a US civilian POV) sought to comprehend Soviet (and now Russian) military capability from afar since the early 1980's, it has long been my perception that (due to the political system in place there and the resultant poor economy) only 5-10% of Russian/Soviet military units nominally in existence have sufficient morale, training, and full provisioning with modern equipment to engage in successful offensive operations. In other words, that 5-10% of their units are lavished with the best people, training and weapons, and the remaining units make do with sub-par everything (at best).

Is the above an inaccurate perception?