Have any of you noticed runtime differences on your MBP's since upgrading to Lion? I've got a mid-2009 version, 2.53ghz with 4GB of ram, and I seem to be getting much longer runtimes than under snow leopard. I haven't done extensive testing, but it feels like I've gained over an hour while still doing regular tasks such as running firefox with tabs open, a youtube video rolling, and some text editing. It seems wrong, so maybe it's reporting incorrectly, or maybe the OS is more efficient? At any rate, let me know if you guys notice anything.