Ok, I just watched Pete Bonnani's "Art of the Kill" and he touched upon exactly what I was talking about when I started this thread, and what Zazen and Trotter put so eloquently.
Speed builds a bigger 'escape window'.
Bonnani explains that, when you enter a fight, once you begin maneuvering both your energy and your SA begin to decrease. When you begin a fight, your escape window is large. As a fight goes on, both your energy and your SA go down; and with them, your escape window becomes smaller.
Upon entering a fight in the MA, your escape window depends on a number of factors: how far from a friendly base, other friendlies around, your alt, speed, type of plane, etc. Once you engage and commit to a fight in the MA, your escape window gets smaller as a factor of the parameters that initially determined the size of it.
Any plane, even the 262, caught low and slow on the deck can be hit and killed by another plane.
But, assuming a moderate environment, avoiding extremes of alt and energy, I think speed might be the best asset for a plane to survive engagements in the MA. If you blow everything, this argument doesn't make sense. But, if you fight sensibly, having the top end speed may be the biggest survival factor in the MA.
I use the situation I portrayed earlier to illustrate my point. I engaged outnumbered and successfully fought defensive BFM to defeat two bogeys and get into my escape window. Neither the Yak, nor the Spit were a factor once I disengaged....with enough top end speed. It was being a bit too slow that allowed an enemy to very slowly catch me (and kill me) that was the biggest factor in the fight because once I got into the fight, the only thing that would allow me to successfully disengage was to be able to egress out of gun range of the bogeys.