I've got buff, gold laced, blue/splash, a couple of lavender and a silver laced and they are all quite docile (except for my enormous buff cockerel who is might protective of his girls - so I pick him up and give him a cuddle whenever he attacks my wellies). But I wouldn't say clumsy. Mind you, it's probably what you're used to - I only have a handful of other chickens (one light sussex, two marans and one araucana) and they all seem very agile to me. I can't get used to the fact they can get off the ground and I have to watch to make sure they don't fly over the bottom of the gate when I have it open.
H