My experience with fanfiction.net has been an incredibly consistent one piece of feedback per 100 hits - although that applies only in the early days of posting. After that, the stats go a bit funny. Whether that's representative, I don't know, but the system there provides clear stats, so it's interesting. I've only had one fic nominated on BBF, and there was no real discussion about that, so I can't really go by that list, however allaboutspike has been a pretty good source of feedback for my Spike fic. I'd love to know what feedback stats are on that site! The other stuff I write gets feedback from my LJ friends, but none from anywhere else - even Symbiosis, which garnered heaps of gacking here on LJ, and is by far and aware my most recced fic, has never recieved even one piece of feedback anywhere else.

Feedback is odd :)