Ok, let's avoid just cherry picking exceptions and look at the whole picture. Here are all of the 1st round wide receivers going back to and their 40 times.
2018:
- D.J. Moore: 4.43
- Calvin Ridley: 4.42
2017:
- Corey Davis: N/A
- Mike Williams: N/A
- John Ross: 4.22
2016:
- Corey Coleman: 4.42
- Will Fuller: 4.32
- Josh Doctson: 4.50
- Laquon Treadwell: 4.52
2015:
- Amari Cooper: 4.42
- Kevin White: 4.35
- Davante Parker: 4.45
- Nelson Agholor: 4.42
- Breshad Perriman: 4.24*
- Philip Dorsett: 4.33
*Pro day time
2014:
- Sammy Watkins: 4.43
- Mike Evans: 4.53
- Odell Beckham: 4.38
- Brandin Cooks: 4.33
- Kelvin Benjamin: 4.61
2013:
- Tavon Austin: 4.34
- DeAndre Hopkins: 4.57
- Cordarrelle Patterson: 4.42
2012:
- Justin Blackman: 4.46
- Michael Floyd: 4.40
- Kendall Wright: 4.49
- A.J. Jenkins: 4.37
2011:
- A.J. Green: 4.48
- Julio Jones: 4.34
- Jon Baldwin: 4.49
2010:
- Demaryius Thomas: 4.52
- Dez Bryant: 4.52
2009:
- Darrius Heyward-Bey: 4.30
- Michael Crabtree:4.54
- Jeremy Maclin: 4.43
- Percy Harvin: 4.41
- Hakeem Nicks: 4.51
- Kenny Britt: 4.47
Of that 10 year sample, the following are the players who, in my opinion were drafted in the first round primarily for there speed and/or overall athleticism:
- D.J. Moore
- John Ross
- Corey Coleman
- Will Fuller
- Kevin White
- Breshad Perriman
- Philip Dorsett
- Tavon Austin
- Cordarelle Patterson
- A.J. Jenkins
- Demaryius Thomas
- Darrius Heyward-Bey
- Percy Harvin
I think history tells us that you absolutely can overdraft speed and athleticism and you had better be darn careful about doing so.