Whatever. I disagree. Period.
No intention of forcing you to believe me, but I really must comment that what you're seeing is more or less a misunderstanding.
P-51s are more numerous than ever, and G-10s and D-9s saw a large rise in usage. Great many P-38s are flying around, and the F4U now sees more usage than the F6F than compared to AH1. Also, the La-7 population seemed to waver, but is back on the rise.
In this environment, the "slower planes" basically don't stand a chance at all - not talking about individual skill, but as a whole. Planes with service introduction dates before 1944 rarely ever catch anything now.
The only planes that are caught by slower planes, are either the same slow planes, or people who made irrecoverable mistakes even by AH2 standards, and are about to die. Naturally, that tends to make people feel that being in a more maneuverable plane is better for gunnery.
But that's like saying a hunter in a wheel chair shooting at a fish in a barrel right in front of him, is more advantaged, than a full-legged hunter running around the woods for deers.