I think there is a wide range of QT practices. For some other herps that are are known to be somewhat regular sources of collection-ending pathogens (geckos, all snakes but especially boids), I'm pretty strict: fecal tests before leaving QT for those prone to intestinal pathogens, housed in separate room, QT animals are last care for the day, etc.
For darts, I don't buy from untrusted sources, and never WC, so the initial housing choice is made with an eye to observing the animals for proper behavior and feeding, and sometimes I split up groups to watch for hints about sexes so I can pair them off into their permanent enclosure. If I was buying animals that I had a hint that they might likely carry pathogens -- from a general pet store/mega online herp flipper/anywhere that the animals went through the wholesale system (which I personally wouldn't buy from), or WC (which no one should be buying save a handful of very experienced breeders) I'd do the separate room/final testing QT process.
My dart QT vivs are set up just like display vivs, but smaller.