I've brewed a couple extract batches and am now considering moving on to something more complex... planning on doing a porter for my next one. Before I've just fermented in primary for 2 weeks, then bottled and let it sit for 2 more weeks before drinking. Both batches turned out great, but I've heard dark beers can benefit from a longer process. I've heard people talk about leaving it in primary for as long as 4-6 weeks which seems weird because I've heard leaving it longer than 3 weeks or so makes it taste yeasty. Is there any truth to that? What about bottle conditioning? Is 2 weeks long enough or should it sit longer in the bottles?