As far as growing as much meat as possible as fast as possible, the CX's can't be beat. But that's not the most important criteria for many of us.
Some of us prefer more vigorous, active birds, that you can keep around and breed more. Even it they grow slower, even if they may not be as big. It's what we prefer, it doesn't matter that it's not what you would choose yourself.
Both of you, Bossroo, and Jaku, are well aware of this. It's been re-hashed over and over and over and over and over and over and over.....................every time anybody states a preference different than yours, you drag out this same old tired horse and beat it for awhile.
The Cornish cross is your bird of choice, we know that. I for one, am glad you have something you are happy with. Enjoy, I hope it continues to work out well for you.
They are not my choice, and I really do wish you could bring yourselves to respect other people's choices, even though they are not always the same as yours. Can't you accept that not everybody wants the same thing you do, and that it's OK if they don't? Really, life goes on, and it doesn't affect you one little bit if I or anybody else raises a different kind of chicken than you raise.
Plantguy, IMO, if you raise it for meat, it's a meat bird. If quail can be meat birds, and doves, I see no reason whatsoever that any breed of chicken you want, can't be a meat bird. If you want something that only grows a little slower than Cornish X's, you might try red or black broilers, or the colored rangers. People who raise them all seem to like them a lot. They reach table size somewhere between 9 and 12 weeks, I believe.
Standard Cornish are good meat birds, but they do grow slow. I prefer the flavor of the slower growing birds, myself.