"The reverse, however, is not true, a very manueverable plane need only erode the E state of the opponent to the point where he can use his distinct manueverability advantage to consumate the victory"
The plane with the E advantage should never be in the position to let a turn fighter dictate his E state. If so he, like me, just wanted to get in fight and see how he could do against the turning plane. If you really want to stay alive in a fast plane, odds are the survivibilty percentage favors it, rather than a slow plane. I think thats fairly obvious.
But back to the topic of the thread, to be part of a furball, I believe the consensus believes its at equal speeds in a turning mass of planes, most likely on the deck with no way to dive out to escape, having to brawl your way out of the fight. Traveling through one, although low, with speed, doesnt constitute as being part of that furball, merely going through one.