I am impressed by your ability to remain steadfast in your opinion, even in the face of overwhelming contrary evidence. Consistently. Did you look at the pictures in the link I provided?
I have an iPhone 4s myself, and the picture quality is, in my opinion, quite good.
Looking at those pictures, and the comments, was very interesting. I'm not a camera expert by any means, but I clearly see in those pictures different lighting of the keys and clearly different shooting angles, more than the relative difference in size of the devices would indicate. The cityscape shots showed significant differences in cloud movement. Unless it was a VERY windy day, the lighting conditions might well have been different.
The camera+ application is a great app - I have it for some of my Apple stuff. However, it's "clear" from those photos that the user took advantage of the clarity feature. This is analogous to comparing a photoshop processed image (okay fine, a microsoft picture "fix" setting) to a picture straight out of the camera. Hardly a fair comparison.
Again, with the macro shots. An apt comparison would be a macro lens on the DSLRs, which wasn't used.
So I wouldn't consider it "overwhelming contrary evidence" - more like a few data points that may or may not be useful/relevant. The number one concern for this thread would be its use underwater. Did you look at the low-light picture in the comments? I'm also interested in the other attributes that may make it more/less useful underwater - focus speed, continuous picture speed, etc. Underwater I may not have time to set up the perfect shot, but fire away and make liberal use of the delete key in post processing.
I think there's a clear difference between land use and underwater use in terms of availability. On land, my phone is in my pocket - as someone else has pointed out. However, if I go diving I carefully plan what's in my dive kit and what's not. On land, a phone camera may well be the best option because I'm not going to carry a camera wherever I go. In a carefully planned and executed dive I think different factors come into play.