I agree with this... It's not realistic to raise them individually, and I doubt that any major breeder would make that claim. I'm not saying it would be a bad thing to do, as I know someone raising panthers individually and I think it's kinda cool, but I don't think it's something that's going to decide the life or death of the animals. As with anything chameleon related, you've just gotta have an eye for problems, an eye for hostilities. If you have a group of 8 and one is growing noticeably faster than the others, he/she gets pulled into a "bigger sized animal's cage."
I currently have 3 breeder male veileds, and every one of them lives permanently with at least one female. I have virtually zero problems with these animals, because any animals that I noticed a problem with were pulled and caged individually. When they're raised together from a young 'pre-breeding' age, they usually learn to adapt to eachother's presence, much like raising a dog with a cat.
To say that a young animal can be caged with another young animal isn't really wrong. I don't notice hostilities if raising like-sized animals together until one is gravid or occasionally just incompatible at maturity.
I know this may go against what many books or outdated websites say.... Just keep in mind, these are the same books that say you "have to breed a veiled female at her first receptive period or watch her be egg bound and die."