Since upgrading to Lion, I have enjoyed it a lot. Unfortunately, I have noticed on both my mid-2010 Macbook Pro 17" and 11" Macbook air that the boot up and shut down times have dramatically increased. Most importantly, it is the shut down time. Before when my macs were running snow leopard, my mba took less than 5 seconds to shut down, but now, it takes at least 20 seconds! My macbook pro takes more than that. This is just unacceptable. Has anyone out there experienced this and know of how to fix it?? Any help/suggestions are welcome.