Guys, what premine? What are you talking about?
How stupid should be devs to take 80% of ALL coins? It's imposible to dump such a massive amount. It's hard to dump even 100 mil now, not 150 bil. Even a schoolboy understands this =)
my guess is that it was just a test coin and then they just decided to get it known and dump it for a few BTC.
Thats my favorite theory also.