How come the movement speed boost doesn't work with abilities like Javelin Toss and Mystic Shot? They hit zero/one target so shouldn't they apply the movement speed boost?

skill shots are not "target" abilities. So it's impossible for them to be "single target"

But Nidalee's Q procs Furor Boots and it's a skillshot. According to another person on the forums Morgana's Q works as well. Also, GP's Q can only target one enemy unit, but it does not proc the Furor enchantment, so there's certainly a major inconsistency going around with the boots.

Edit: Seems that this has been fixed. Both GP and Ez's Q now proc Furor like it should

Funny enough if you have Tiamat or Hurricane, you still get the bonus as well.