You will find than many of us will advocate waiting a couple more weeks before even moving it to secondary. Though many of us opt for 1 month in primary and no secondary unless we are oaking or adding fruit, we even dry hop in primary after fermentation is complete (I wait til 2 weeks after yeast pitch to add hops.)
Just because the beer may be done fermenting, doesn't mean that the yeast are done doing work. If left alone, the the yeast like to clean up the byproduct of their fermentation; the stuff that produces off flavors.
Even John Palmer talks about this in How To Bew;
Originally Posted by How To Brew
Leaving an ale beer in the primary fermentor for a total of 2-3 weeks (instead of just the one week most canned kits recommend), will provide time for the conditioning reactions and improve the beer. This extra time will also let more sediment settle out before bottling, resulting in a clearer beer and easier pouring.