You really think so?
He's not blindingly fast, but he's not as slow as he looks. This website says he has been clocked between 4.47 and 4.68, so they gave him a 4.58 (average, I guess). If he's anywhere near that fast, that's good enough with his size and hands and play-making ability. I looked up the times of some other big NFL receivers, and while there are some like Calvin Johnson and Andre Johnson and Jordy Nelson and Demaryius Thomas who are huge and can fly, there are several who are plenty successful without being pure sprinters:
San Diego's Malcom (didn't realize he spelled it that way) Floyd: 4.68
San Diego rookie Keenan Allen: 4.71
Anquan Boldin: 4.71
Hakeem Nicks: 4.63
Larry Fitzgerald: 4.63
Art Monk, Cris Carter and Jerry Rice never ran a 4.5, and they're all in the Hall of Fame.
I'm not saying Evans is great … although he has looked pretty good in college. I'm just saying I don't think he's so slow that he can't be successful. A big guy, especially, can make it work without blistering speed. He could end up being a stud like Boldin or a bust like former massive USC/NFL receiver Mike Williams.
http://www.nfldraftscout.com/ratings/ds ... &genpos=WR