I ride on roads and paved bike paths fairly frequently and I periodically see a guy ride by and he will have about 15inches of seatpost sticking out of his frame. Other times I will see other guys that have their saddle flush with the frame and no seatpost sticking out.

Makes me wonder....

Does no exposed seatpost indicate that the frame is too big and the rider compensated by bottoming out the seatpost? On the other hand, 15inches of of seatpost sticking out would indicate too small of a frame, right?

Myself, I always end up with about 4-8 inches of seatpost sticking out. Can't help but wonder about some of the other guys I see riding around with 15inches or none at all. I understand that as long as it works, it works, but....