Using "link" on Google's search shows something like 38 and Yahoo Website Explorer shows like 7... but going from Google's Webmaster Tools shows 2.9 million htt

Using "link" on Google's search shows something like 38 and Yahoo Website Explorer shows like 7... but going from Google's Webmaster Tools shows 2.9 million http://imgur.com/cTaKE.png http://imgur.com/cTaKE.png I have no idea what is up with that discrepancy...