15 of my 16 "straight run" chicks (RIR and Barred Rock) were ROOSTERS...Now, I confess that I did not eat these -- they've been sold to others who wanted gorgeous roos or sent to do bug patrol on farms.
There was a HUGE difference between the "meaty heftiness" of the RIR's and the Barred Rocks. People around here are telling me that folks want Rhode Island Reds for eating -- I have NO idea why! They are scrawny, bony things...even my giant RIR rooster that looks fantastic is puny compared to the real solidness of my (smaller) Barred Rock rooster -- I'd say the Barred Rock outweighs him by 2 pounds at least. Also, most of the RIR's that people around here get are from production reds, bred to increase laying ability, not meat.
I bought Golden Comets for dual purpose meat birds -- one, because the GC is a hybrid, so I don't need any GC roosters for a breeding program. Two, because they were REALLY cheap. Mine have free ranged, are 5 weeks younger than my RIR's and outweigh them dramatically. At 12 - 14 weeks they produced 2 - 3 pound fryers. Now they are 18 weeks, and some of them will make close to 8 pound roasters. They are free range, get lots of exercise, but they are meaty birds. I hypnotize them and then pith them (kill the brain) while they are restrained from flapping, and then bleed them out. They go off to Camp Kenmore feeling relaxed and pleasantly sleepy, no aggression hormones in the meat.
And...I agree with everyone else -- if you want more the texture of "store" or KFC chicken, go with the Cornish X's.