Is this right?
http://www.usatf.com/athletes/bios/Culpepper_Alan.asp
For some comparison, I'm 5'7 and slow and I weight 130.
http://www.usatf.com/athletes/bios/Torres_Jorge.asp
http://www.usatf.com/athletes/bios/Webb_Alan.asp
I guess height and weight don't make too much of a difference, it's probably more of a matter of % of body fat and balls/guts.