To be ENTIRELY honest I think they are WoW hunter converts, the sort of people that complained about how there was a pet the entire time, since it's inception. They're used to the run and gun play-style, AND being top DPS or at least competitive. So when they came to a new game with a similar class with a similar play-style they were excited.
What they didn't realize is that unlike WoW this game still has a hybrid tax, and unlike WoW this isn't the Blizzard design team. Hunters were OP in WoW, at basically all times, and extremely hard to balance and always seemed to be out of the norm.