Do you think it makes a difference whether they were incubator hatched or day old chicks and saw you first?
I'm not sure about imprinting and chickens. I do know it makes a heck of a lot of difference with turkeys (absolutely curious pests) that, as tiny poults, won't shut up if you leave the room, and as chuffing galomphers won't leave your side as you go about your chores.
We hand raised our chooks (had them in folding dog cage until coop and fence were up). They'd sit on their roosts and watch us. Either cass or I would carry each out to the dog pen in the morning and back in every evening (hold out hand and see if they'd walk over). The Black Sex link chicks would come right to our hands, the Red Sex links wouldn't complain when we'd pick them up, but the Gold Sex Links would go bonkers and have to be chased down.
The Gold Sex Links range the furthest, are the last to the coop in the evenings and are the only ones to have suffered predation (fox killed one/one stitched up after fox attack). The BSL's remain the most placid and easy going, Red's remain so-so.
None like to be picked up. However, they like to hang around, and every evening that we're able to let them do some supervised free ranging, they always spend the last 15 min. or so preening and gossiping up on the back deck next to us (the roo will sometimes hunker down and take a brief siesta between us).
The earlier the contact the better and associating Mr./Ms./Mrs. hand with being taken to sunny grass or safe cage at dusk can't hurt (but I'm with TxCR: If the roo could he'd chomp me down like a locust on wheat).
Just a couple shots of `tame' chook pack:
Grape beggathon:
Roo giving me a `sitrep' after he and the girls returned from evening patrol.
P.S. One more 200Lb. chook pointer: If you let them sit on you or your kid's head - wear a hat (these velociraptors have been known to treat eyeballs like grapes, and that eyepatch will be hard to explain...).