Alexa Changed their Ranking

I was casually searching for my entertainment niche site Actress Snaps' ranking in alexa and was was quiet surprised to see my site jumping close to 100,000 position compared to yesterday. so I decided to take a peep into what's behind the sudden surge. It looks like Alexa has refined its ranking system. Alexa ranking system has been under heavy criticsm from all part especially from the best in the blogging business. The main criticsm was that Alexa ranking was based on the number of users who have installed their toolbar.Now they claim that they have refined their rankings by adding more factors. they haven't revealed what all those factors are. But anyway now it looks like more close to being accurate. atleast Google is having a 2nd ranking in their newsystem, but still can't digest the fact that yahoo is more popular than google.They alos claim that they are still collecting data for the new ranking system, so can expect a few more jump very soon.