Nikon D90 users who take photographs outside of the F2.8 to F5.6 aperture range and with a fast shutter speed are the best photographers on Flickr. If they also post-process their images with anything but the manufacturer-supplied software, and license their images with Creative Commons licenses, then they’re even better again.
Using a variation of the Elo rating system to objectively rate the quality of photographs, these are the results from ELOgrade’s calculations looking at the quality of photographs compared across various EXIF data categories.
Of course, they went and spoilt the fun:
Please keep in mind that correlation does not imply causation as well as the sample methodology and size used by this report.
But I did like this comment, on discovering the correlation between Creative Commons licensed photos and higher quality ratings:
Maybe people who take the effort to make it easier to share their work do tend to take better photos.