I have found that as well. In particular, I see Old English Game Bantams as more friendly and smart than a lot of other breeds because of multiple lines of them being bred for show.
I have an Old English Game Bantam cockerel, and he is friendly and smart. I doubt he will ever grow up to be an aggressive rooster. It helps to make a cockerel friendly if you hold him for long periods of time and grab him often. Overall, it always depends on what the individual cockerels'...