having built n ridden numerous o/s legal frames
tnt, elves, revcore, clayborn, i gotta say, its very much down to the rider, i also think a few riders having leaned towards the longest frames they can get realise that it doesnt mean the best ride, i went for the longest frames i could find and the easiest frame by far i have ever ever ridden is my likkle 19 1/2" tt elf dbl X, im keepin it for my old age
all the above have/do ride nice tho.