The shorter the rake or the "fork curve" the quicker it gets to make a turn (simple geometry)... the heatube angle have an effect in this also. Stuff like for example how soft the ride will get... and the handleling of the bike... Usually bikes whith tight geometries turn quick but at the some time sometimes are hard to handle... For track bike there is an average of 3cms of rake and a head angle of 75 degrees go over that u get a bike hard to handle in the upper banks if u need a to manouver fast.

Well im talking too much...

cya