Completely unimportant. If you're a bit short in the legs for the frame, just lean it to the side and put only one foot down.

I'm 6' and all my frames are big. The Hillbrick features a very high top tube because it's fixed gear and thus has a high bottom bracket. I've never been bitten.

Incidentally, here in Australia, we say people with short legs have 'Ducks disease', their bum's too close to the ground