My browser is quite slow accessing a number of sites today and they are all slowing "waiting for ad.doubleckick.net"
I do not think this is the ad.doubleclick virus. I'm not having strange ads or redirects. And, I do not have Ad.Doubleclick.net installed on this Windows 7 PC, nor do I have an extension with any name even similar to that. (I recognize all my Chrome Extensions).