My score is based on comparing the phones features with the best of the best.

For the camera, L920 receives a 10 because it's the best smartphone camera (Pureview 808 doesn't count)
Display: It isn't the best display, but it is one of the best. So it deserves a 9 instead of a 10.
Ecosystem gets a 7, because WP has a lot of apps, but definitely not enough. Microsoft and Nokia bump this score up with their own ecosystem and apps.
Some people have problems with their batterylife, I don't... :)
Performance and Software go hand in hand. Some minor bugs with WP8, but none by which I start cursing or something. Also I don't have any crashes, or random reboots...

Final score a 10? Yes, just to fuck with the biased score from The Verge. If you give the ecosystem a 5 compared to iPhone and Android. Then give the iPhone 5 lower on display and camera, because L920 owns them.