Segmenting Search Engines: Dweebs, Horndogs, and Geezers
Nick Carr has done an entertainingly ad hoc segmentation of the search industry based on the most popular searches of 2006:... I think I can suggest the following market segmentation: Google users are dweebs. Yahoo users are horndogs. And AOL users are geezers.This is wildly influenced by keyword filtering, but is still entertaining stuff. 1

