Stir/crash/decant and harvest and repitch both get me ales to FG in 3 days and cold fermented lagers within 7. But unless you're measuring, appearances can be deceiving. Bubbles don't mean much. And you do want to leave a few more days for conditioning, but several weeks is definitely a long time. Suffficient pitch of healthy yeast, oxygenation, and a little yeast nutrient help.