Mirror's Edge is really tough

Now I'm not talking about the single player. Even on the hardest difficulty it wasn't that challenging. The Speed Runs, however, are a serious pain in the ass. I'm trying to get all of the trophies for the Speed Runs, but I only seem to be able to complete the tutorial. Even the first actual level is stressing me out! Six minutes is given to complete the mission, and I always cut it, no matter how many times I try, at around 6:45 or so.

I try moving on to other levels, but the same thing keeps happening. I already completed everything else there is to do in Mirror's Edge, so I think I might just throw in the towel now. Anyone up for some co-op in Resistance 2? And I would like to hear if anyone else has had issues completing these runs, or I just suck.