If there were premined coins, they should show up in the block explorer.
I guess the funds for giveaways come from the first block:
http://frozen.blockchainexplorer.co.uk/block.aspx?hash=00000c6d0e9779f444e434b2e0b86409266d137baf07dc7d63c76295a78f7bf7
The block reward is 1000 instead of 50. This is sort of "premine", but it is indeed a very small amount, and it is essential for a giveaway for promoting this coin.