More like the zoom/climb and E-retention allow constant bnz, but yeah, true. Of course, this is also true of a pair of F4Us, a pair of Jugs, a pair of 190s, etc.
While true, I don't see this happen often, and I don't have a good reason as to why...
What's the problem here? Our AHII 109s don't get stiff controls until you pass 400mph IAS. 400mph IAS is way fast, especially at a little higher altitude. (Galland would have given his right nut for 109s that handle like the ones in AHII IMO.
) Bnz was a fairly standard tactic for the Germans from the Spanish Civil war onward.
I'm not saying it's not possible for 109's to do it, but I find it more difficult since I actually have to make sure to pull out if the con starts diving away. I just tend to see more use of the 109's powerplant than BnZ in-game.
The 190D has an initial climb rate of over 4,000fpm and remains a front-runner in climb rate up to 15K. If anything, one would think it's zoom qualities would be superior to a 109s because of greater mass and "density". So yes, it isn't quite the vertical performer the 109G-14 or K is but it outclasses the P-51. The only quality where the P-51 is definitely superior at typical MA alts, and the one that makes the 190 easier to fight, is wing-loading. Of course, this turns out to be important...makes one wonder why the Germans devoted so many resources to 190s when the game demonstrates that the Messerschmidt is obviously far and away superior?
Oh well.
Yeah on WEP it's something like 4600fpm, and German WEP lasts days, but I still don't feel all that threatened by 190's in the Pony, even when they are above me. But like I said before, everything I've stated here has been based on in-game experiences I've had.
Fixed! 
Well, no, not what I meant. I wasn't saying 2 v 1 per say, but rather a low group of cons with 2 *smart* Pony's above them. However, being ganged is no fun in any plane...

BTW, do you happen to have much time in the P-47 D-11?
No, I don't. I have flown it a few times before, fun little fighter, never really kept my attention long though.