Last night was the first time I heard anyone say 'horde' on 200, and I was pretty disappointed. 9 players on one side, 11 on the other. Not a horde.
When I see things like that going on in AvA, where I kind of expect it to be a little more civilized (err... unless storch is on), I'm gonna split. You may not care, because I may not be a 'leet' pile-it like you and have flawless ACM and SA, but I'd say that, looking at attendance numbers in AvA, if you want to actually have adversaries to fight in there, it might be worthwhile to avoid the 'MA ego-mouth' habit if at all possible.
Note that the 'you' is rather generic in nature in my post, however certain 'pile-its' may feel like I am directing this towards them. If you feel that way, you're probably right.
I usually really enjoy the AvA, even though a lot of the time I'm hopelessly outmatched, but when it gets MA-style stupid, it really kills it for me.