In Q2 2006, search generated 58% more referrals than portals in aggregate, up from 20% in Q1 2006. Search also generated 48% more referrals than third-party automotive sites, in aggregate, Compete says. Search dominated the number of referrals to original equipment manufacturer (OEM) branded sites with more than 10 mln user sessions in the second Q of 2006. Google is just as effective in driving sales leads as online auto channels, delivering 6.8 mln referrals to OEM sites in Q2 2006, more than any other individual Search Engine, Portal, or Third Party Auto Site.