Hello DrChandra,
I've been following this thread from 6 or 7 months ago and your comments are a of good reference for me.
I've got a 2011 MacBook Pro 15" and, as many other users, I switched from SL to Lion and noticed, immediately, the drastic battery life reduction. As I'm doing transoceanic flights at least once a month and I need to work on the flight, for me that's important.
I lived a very bad experience when returning back to SL from Lion (different archive structure for Mail, backups from TimeMachine not compatible, ...) and, in any case, I won't live that again.
It really pays my atention your evolution! You seem to have accepted that Lion battery duration will never be the one of SL and you just accept it, isn't it?
Now, I normally have 7 hours in SL (all under control: no bluetooth, no wifi, low screen brightness, no keyboard backlight, no flash, gfxcard, coconutbattery on the background to check consumption, etc, etc) and, anyway, under these conditions, I think battery should last more than this!
So, my question is: if i return back to Lion, what would I find? 5 hours? Not for me!!!
As you said, I'll wait one or two years for a really major battery improvement and then I'll renew my mac!
Bst Rgds!