Forum Moderators: Robert Charlton & goodroi
Usually, within a few days of seeing the first pages indexed, you get what I call the honeymoon period if you've built the site well -- nice rankings, often better than you expected. I assume Google is measuring something in this trial period, and perhaps seeing if your site will take off very fast.
However, unless there's something about the site that stimulates an unusually high level of interest, those first honeymoon rankings go away in a week or so. Now it's time to watch the paint dry. If you keep the site "well ventilated" with new content that stimulates a growing backlink profile, the paint dries faster.
Then, over two or three months, rankings improve for real. It's sometimes faster than that, and good rankings are almost never as slow to appear as they were 12-18 months ago, in the depths of the "sandbox effect".