Yes, the Su-30mki and Mig-29OVT retain full responsiveness and control at high alpha, just because the control software doesn't allow certain roll/pitch rates on the f-22 doesn't mean the Sus and Migs suddenly got some control issues.
This 'size doesn't matter' discussion is a bit useless, considered the migs and sukhois were mere upgrades of vintage 70-ies and eighties' designs, while the F-22 was already designed to have high thrust engines, TVC and all those things.
Just like comparing the Mig-21-93 with a Block 52 F-16, sure they have nearly the same avionics, but the design itself is different.
There are no other 5th gen aircraft flying, until then the F-22 will have the best T/W ratio and payload capability, but that doesn't matter the Russian planes suck, as some of them are 20 years older of design and can surpass the F-22 in some maneuvers. Why not allow them to pull the FCS breaker and try a proper Cobra with TVC locked out, then we'll discuss aerodynamics of the Su-27 and compare them to the F-22, even though they're 30 years apart.
I'm almost inclined to say that people from the US are somehow believing the F-22 is some super plane as per LM propaganda towards the Congress, but seriousely, what do you expect for such sums of money?
And against who are they trying to potentially use the F-22? It's too expensive to take on thirld world countries because of the risk of getting shot down, and against Russia/China they aren't effective as well due to extensive passive array developments over there, not to mention long wave radars to vector a missile that will do the terminal homing on itself. You can't use them for Jihad blasting as well, because of the MANPAD risk. So, why is tat thing flying at all? Any nations that can counter it can also send quite a lot of megatonnes of TNT with a radioactive side effect, and the countries that are likely to be invaded by the US either lack a proper air force, or the F-22 is deemed too high value to engage any 3rd gen Mig-21s and L-39s with rocket pods.
They should halt the F-22 production immediately and concentrate on the F-35, which has some real growth potential and advanced systems (for its class).