around here it seems to be Goldens for Obed and Rally. theres also a wide variety of "everything else". i haven't been up on Agility, so not sure. There seems to be a "core group" that trials in Obed and Rally, you see the same folks at most of the trials. There are a few labs, but not that many-lots of shows Scout is the only lab there. there's a new group of 2 or 3 girls with nsdtr's i've seen since last year. she is a bit loud, and her dogs are a bit all over the place, and the worst thing is she's going on and on about breeding...i find it hard to resist the urge to take her and her "posse" aside and ask if she has a clue... sigh.
we train with some nsdtr breeders. Their dogs are nice. they put their conformation titles on them as well as obed and working titles. Their dogs aren't allowed to be loud while working. They say it takes work since they are puppies but the dogs need to be able to be quiet while they're working, and not loud things disturbing everyone. they are both judges for HT and WC's so i guess they have seen lots of that noisy bit. They have expressed concern about the recent increase in popularity with the breed, worried for the health of the breed.