The %age chance to do damage to a tank that is meaning ful i.e. kill or render main gun inoperable is a bit complicated to calculated given the dual dolls required. But those D rolls are 50/50 for NO damage at all. Rough odds.
I'm feeling like the 1941 T-34 is over gunned and too fast, but hey its a game.
We did the 501st scenario today and I'll have to say, the Tiger tanks didn't worry too much about the damage to the T34s. It was hard not to kill them. However, when you do look at the other German tanks that are much weaker, then yes, the T34s do seem a little resilient.