ill admit that ive nevre owned or ridden a track only bike... but my low->mid end convert has, what seems to me, pretty aggressive geometry. there is 3/4" of clearance between the rear wheel and seat tube, and i can get toe overlap pretty easily. completely level TT, 73.5* parallel.

also, compared to an 80s trek that i had, this bike definately seems a lot "quicker" in the steering department. as it is, its pretty darn manueverable. i really cant imagine riding something more twitchy and 'unstable'