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Yes and no... They are bred to produce meat, if that's your goal they will do it. Not too many people complain when their red sex-links or white leghorns produce eggs day after day after day, but many of those strains have been selectively bred for decades for unnaturally high egg production.
Many times folks want to raise some meat birds and the advice that they get is to feed them high protein feed, keep them at a high stocking density, and butcher at 6-8 weeks. They stick them in a small pen with a tin roof out in the middle of the pasture under the hot sun because it's "more humane" than raising them in a house. Then when they have problems they holler "These things suck!"
If you want them to grow as fast as possible then it's going to take careful management. On the other hand, you could feed them a feed that is lower in protein, let them run around, and butcher them when they are ready just as you would other birds. They still probably won't live as long as a standard bird and will eventually have problems, but they aren't meant to live for years, you are raising them for meat.
Perhaps folks have greater success with dual-purpose birds because they treat them like chickens. They feed them moderate levels of nutrition and let them run versus vs confining them to grow to slaughter weight.