Word has it that huntresses aren’t that great. They have marginally lower hit points and slightly lower damage than a knight… But they have range, their attacks bounce to multiple opponents, they cost 60 gold less, and are available far far quicker.
Until I see a Human vs. Huntress tactic that actually works reliably, I will continue to consider the use of the Demon Hunter/Huntress quick buildup to be a CheapAss Ploy™. I wonder if the folks at Blizzard wonder why all Necros go for Dreadlord with Sleep and Vampiric Aura, and all Night Elves go with Demon Hunter & Huntress rush. The Sleep command is pretty easily worked around through some micromanaging, but there’s no reliable defense for Humans against those pesky huntresses.