Anyone 6'4"+ that throws 95+ isn't that special really. As mentioned earlier, Lincecum is only 5'10"-ish, so throwing 95+ for a guy his size definitely gets your attention.
Jimenez definitely has a lot of hip/shoulder separation and that certainly contributes to his velocity. There is a clip of him in the pitching clips forum.
Mota and Hawkins are both pretty big as well. Mota is 6'6"-210, while Hawkins is 6'5"-215.
Now imagine if Lincecum was around that same size with his same explosiveness and mechanics. He'd probably be up there with Verlander and Zumaya around 100. I don't think anyone can argue with that.