Capons are more tender and juicey than a regular rooster, but I seriously doubt they would be better than a Cornish X roaster. We butcher our Cornish X at about ten to 12 weeks and they dress out in the 11 1/2 to 13 1/2 pound range. We like them much better than turkey. The Cornish X is your standard supermarket chicken. Cornish game hens, fryers, broilers, and roasters are all the same chicken. The difference is the age and size at processing. A capon might have a more intense flavor simply because it is older than a Cornish X roaster of the same size. But it sure wouldn't be any tenderer or juicier. If your friend has his heart set on a capon, he is just going to have to call around. I don't know if anyone caponizes chickens commercially any more. I can tell you this. If he settles for a large Cornish X roasting chicken, he won't be sorry.