I've noticed that new things they've indexed perform extremely well for a day or two, then fall like a rock if they're not from an authoritative source. After

I've noticed that new things they've indexed perform extremely well for a day or two, then fall like a rock if they're not from an authoritative source. After the couple days that fresh results are towards the top, Google seems to put more relevance on good incoming links. In order to have those links, the content has probably been there a while. That's probably why results are a bit stale.