1. "The 40 is the most overhyped part of the NFL draft" In response to In response to 0
It's just the sexy stat.
However to answer your question, yes there is a difference at that level. When one LB runs a 4.8 and another runs a 4.4 they don't say well Bin takes 10 seconds. They say well the best players run a 4.4 not a 4.8
Think about track and field, a few decimal points can mean everything.
However football is not track and field and we place way too much emphasis on the 40 time, but at the elite levels there is a difference in those 10ths of seconds.