Are you kidding me? Ask eizh, tacotime and smooth to post here if they mined from launch or not.
Not that its really anyone's business, but ...
I did not mine from launch, and got zero of whatever blocks might have been mined at very low difficulties on the first day.
I was skeptical of how it was being handled and thought BCN (which I had been mining by then for some time) would probably continue to dominate. I was not involved with the launch in any way other than giving some feedback on the thread (which was ignored).
I started mining a few days later when the interest level started picking up and I thought I could stimulate some liquidity with some auction and trading threads.
EDIT: OTC trading thread was started 4/22. Coin launched 4/18.