Hmmmm, after thinking,,, the tiles all are 256 color and MUST be the same size pixels as HTC's tiles, so the tiles are of the same size in information. So that should have no more effect on frame rates than HTC's tiles, i guess the frame rate difference would be the incidentals, I.E. airfeilds, smoke, and sheer number of players and their planes.
Just a guess.
NUTTZ