Other hunters have been telling me that haste makes our serpent sting, black arrow and explosive shot dots tick faster. Is this true? As far as I remember, it has never done this and nothing recently posted about haste even mentions it.
Those other hunters would be horribly misinformed.
Melee classes don't get faster ticking DoTs. For Melee, haste gives more resources.(And Yes, Hunters are a "melee" class, physical RDPS if you would.)
Haste affects your Shoot timer, Focus regen, pet attack speed, aimed shot speed, and steady/cobra shots.
That's about it though.
That's what I thought.