Engadget's photo shoot comparison
Felt this was relevant enough to dpreview that I signed up for an account.
Lumia: 0.3s exposure at ISO 800
iPhone 5: 1/15s exposure at ISO 2500
You really need to download the original photos to get the noise comparison. The difference is immense.
From rough mental calculations (focal length ~ 35mm), the Lumia 920 is getting more than 3 stops of image stabilization. That's quite impressive for a phone, and I don't believe has been done (correct me on this).
|Chicago Alley by tko|
from Down the alleyway
|Callan-5680 by vbuhay|
from What Child's Dream May Come
|Widget by Wilfried HKG|
|Oxbow Bend by stickpointed|
from Landscape - Colour #2