see my commentary on this http://real-estate-net.blogspot.com/2007/01/nestoria-zeitgeist-on-horizon.html
it's hard to see this list as definitive, given they've just been around for a few months and probably dont even have as much as 50% market coverage. if findaproperty.com were to publish something like this, it probably would be more definitive and no doubt reflect the 2012 olympics. more investors and power searchers use FAP, although N is way better