Yes, give or take a cm or two. Tire size and bottom bracket height can mess up seat tube/standover relationships. I have two 56cm frames. The standover heights are 31" and 32" for each.
(edit)
I just found a third 56cm in my living room that measures in at 32.5".
Last edited by jjvw; 12-09-06 at 09:29 PM.