Records reflect production, and in Swope's case they demonstrate production against high level collegiate competition. Also, it highlights how his production declined when he didn't have as good of a passer throwing him the ball. But, when he had a good passer like Tannehill pulling the strings, he was exceptional.
I'm with you on the Randall Cobb comparison, but I'd guess that where Cobb excelled wasn't at acceleration, but rather at initial burst. Obviously, Swope's times bested Cobb's in the 40 so he made up time somewhere, and if it wasn't in the burst then it was either in the acceleration or the top speed ... take your pick, but either is very nice for a receiver. Also, Swope outjumped Cobb in the vertical jump and the broad jump, so it might just be that Swope's burst is better than you think, because that's what those metrics are aimed at measuring. If Cobb had more burst, more acceleration, and a faster top speed, Cobb would be faster than Swope ... but the facts are that Swope was faster than Cobb. Like whichever player you like, but you can't really dispute the metrics as both of them were measured and on all of the meaningful "athletic" metrics Swope beat Cobb. Kinda like a boxer winning every round and then losing the fight ... it just doesn't add up.
Watching Swope's tape you can certainly view his running style as not aesthetically pleasing, but I can't really see how you view it as unexplosive or not-fast. He has the burst to separate, the acceleration to pull away, and the top speed to not be caught from behind. He runs good routes and catches the ball. He's a tad over 6'0 with a 37" vertical, running a 4.34 40, making him one of only like 8 or 10 players at the NFL combine to run a sub-4.4 forty. Unless you think he has a stunt-double, it's really hard to avoid calling him a special athlete. Watching his film you see that the kid simply outplays his competition and he does it effortlessly. He glides when he runs, and on film, that type of smooth athlete doesn't appear to be running as fast as they actually are. Choppy runners like Wes Welker appear to be running faster than they actually are, but Swope is the opposite. Watching him pull away from DB's though, it's easy to see that the kid has the quickness and speed to be special.