After a bunch of schools with teachers who were good teachers but still tried to train me like a little guy, I happen to disagree.
Stuff to stay away from if you ain't itty-bitty:
most northern longfist, including (but not limited to) mizhong, certain schools of eagle claw, certain schools of northern mantis (wah lum especially comes to mind), wushu of course, and any school with more than 40 or so forms (because then you know the priority of the school).
Stuff you may want to gravitate towards if you're larger frame:
Hung Gar, Lung Ying (any southern short actually), Hsing Yi, Tai chi, and certain schools of northern mantis (ironic huh? brendan lai's stuff comes to mind).
Grappling arts like shuai chiao can really hurt if you've got extra bodyweight, but once you learn to fall, it may not be a limiting factor- as most Judo and Shuai Chiao guys are injured 90% of the time anyway.
heheh