Uh, what? Thats not at all correct.
Sweed couldn't run routes at all before he got to Texas, and what he does know is from what he learned here. He's improved largely, but he's still not a great route runner. To get open, he relies on his strength, and while he doesn't have great top end speed, he does seem to have a quick acceleration ability at times (though he is inconsistent with it). He's very good at finding the hole in a zone over the middle of the field.
Also, a penchant for getting injured? He became the starter a few games into 2004, and played every single game in 2004, 2005, and 2006, before he got injured in 2007. He started 39 consecutive games.