Having founded photo.net back in 1993, it has long surprised me that there is no “photo.net for camera phones”. DxO Mark has begun to put up some objective tests that are interesting, though they don’t capture the practicalities of using camera phones. The tests show that the Nokia PureView camera, which averages 41 megapixels of crummy noisy data, crushes the competition in low light (i.e., the indoor conditions where most people want to take pictures). The Samsung Galaxy S III is a distant second in the noise department. Yet worse (though not by much) in low light are the latest Apple products, iPhone 5, iPhone 4S, and iPad 3, all of which offer similar performance.
(Recent tests on the same site show that Canon continues to lag in sensors. The Powershot G15 is absolutely crushed by the Sony RX100, admittedly $200 more expensive. Canon either needs to improve its technology or buy DxO and shut down their web site!)