It does ferment pretty fast- but even after the majority of fermentation is finished, the yeast are still "cleaning up" after themselves, eating their own waste products like diacetyl, and eventually they'll fall to the bottom of the fermenter (flocculate). So, leave it for about two weeks before bottling, unless you are planning to transfer it to a carboy or clearing tank. We talk about the 1-2-3 method- one week primary fermenter, two weeks in the clearing vessel, and then 3 weeks in the bottle. If you're not using a two-stage procedure, then 2-3 or 3-3 would be recommended.
Broken Leg Brewery
Giving beer a leg to stand on since 2006