these college kids literally leave college to train at a pro training facility to specifically train for the events at the combine. it's dumb. that said, if a kid runs a 4.8 as a wr, I'm not drafting him. But look at the raiders, AL Davis was obsessed with speed, and how did that work for them? Spoiler alert: not well.
There is timed track speed in tank tops and speedos and there is play speed in an NFL uniform.
4.35 is unrealistic. most of those guys are smurfs, and you hate smurfs. you get the occasional freak like ja'marr chase, or randy moss or Megatron, but that's the exception to the rule and very rare.
I prefer a 4.40-4.45 guy that's 6' tall, 200 lbs and can run a route. dbs are fast too. I'm sure you are aware, so running in a straight line at 4.35 won't get you consistently open in the NFL. Excellent footwork, being able to accelerate after a break or cut are how you create separation.
if running a 4.35 40 time is enough to become a reliable deep threat, why didn't Tutu see the field? Ever? Tutu was a 4.32 guy and timed as low as 4.27
Don't waste your time looking back, you're not going that way. - Ragnar Lothbrok