When the insta-mine happens before the pre-announced Official Launch Time, and is of such a massive scale, the terminology becomes a distinction without a difference.

In Dash's case the instamine happened so quickly and was so massive as to be functionally equivalent to a premine.

I like how the DashHoles' best defense of their scam-mine is to deploy the good old tu quoque fallacy and quibble about definitions.

It's also fun to watch them insult CMC for having the integrity to do the right thing.  That's right DashHoles, attack-the-attacker...