No, that's wrong. bitcoin 0.1 was released on Fri, 09 Jan 2009 17:05:49 -0800 (md5sum dca1095f053a0c2dc90b19c92bd1ec00 ). The timestamp of the gensis block was 2009-01-09 02:54:25 [1]. The famous quote from the genesis block is proof that the launch was after 2009-01-03: The Times 03/Jan/2009 Chancellor on brink of second bailout for banks.

That he owns 10% of the money supply is due to the fact that interest in the beginning was very low, and everything was mined after launch. And he has spend only 50 BTC of it (at least as far as I know). He might as well could have destroyed the coins, but that might have lead to some confusion.

[1] http://blockexplorer.com/block/00000000839a8e6886ab5951d76f411475428afc90947ee320161bbf18eb6048