This is an interesting read about the allure of 40 yard sprint times. It's from last year but I've seen several topics of this nature discussing the same issue. When you consider the breakdown of Ben Johnson's 100m in Seoul you really have to be skeptical about some of these times. Don't get me wrong I'm not saying that some of these guys out there are slow, but some of these times we here about are rediculous.

http://www.olympic-usa.org/11611_32384.htm