Not surprising to me. The straight blocking is super marginal; the big story here is that they all block each other's outs. There's only 2Q, 1A, and 3K left in the entire deck. That's as many outs as regular AK has against TT, so consequently, TT should have similar equity here as if it's running against only AK. (And of course the AQ's only win with the Q, so only two outs for them.)