If i'm on my fix or my mtn. bike i can ride with out hands for a long time. I can actually swing my bag around and pull crap out of it, or read a map if I need to. On my road bike however, I can barely ride without hands. The front end is extremely twitchy and I don't know if it has to do with the geometry, or if there's something fuxored in my headset.
I did see some dude riding his fix down a super steep main blvd near where I live where traffic goes about 45-55mph while taking his rain jacket out of his messenger bag and putting it on....on a brakeless fixie!

That's skill. Or stupidity.