I find the CG's very nervous and flighty, as much as leghorns, but that's with just 1 batch of chicks. I admit I never handle them, so they should be much better if raised in a small group with frequent handling. Even white leghorns can be calm and tame if raised and socialized properly. I bought 25 pullets from Privett during the summer. They haven't started laying yet, but I have high hopes for them.
If you want a calm, white egg layer, try Barred Hollands. They are heavier and have a temperment like our New Hampshires and Rhodebars, even if not handled. BH's are rare and hard to find, except in PA, where there are several breeders. msladyhawke has them, and I believe there is a breeder in the western side of the state also.