Kolb isn't slow at all. Have you watched him play? He is an entirely different QB athletically from Henne. There are reasons not to want Kolb, but don't make **** up.
I'm not making anything up. I looked up his forty time before I wrote that. The high 4.8's. You don't get sacked 15 times five games by being quick and elusive. Kolb is not an athletic QB.