Mine was the same way..
Besides a few things nothing is really popping out at me...
It probably took 40 minutes, was pretty much done after I wrote my post.
So far, it seems pretty nice. I like the new desktop features, adding desktops, and you just scroll left to right for virtual desktops.
I did the Software Update, and it wanted to update itunes to 10.4, I said NO THANK YOU, and then clicked on itunes (which had been on 10.5b3, and it would not run. So I think Lion installed a version of 10.3, so I just reinstaled 10.5b3 and everything is fine.
Went full screen in Chrome and could not for the life of me figure out how to escape from it. I figured ESC would do it. NOPE. Had to google it. COmmand-Shift-F, and it worked.
The new two finger scroll is in reverse, scroll down and it goes up the page, scroll up and it goes down. I went to System Preferences and immediately changed that back.
I really like the launch pad. That will make finding apps easy, particularly once I organize stuff into folders. Very iOSesque. (yes, I made that word up!).
Not sure I need my user name showing up in the tray, wasting space. Might make that go away, if I can figure out how to. Useful for switching users, but I am the only user on this machine.