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But he's implying that having a .com correlates to success - so % starting with a .com would be a more apt comparison.

Except for the spate of domain names that are .coms but are not the company's actual name, ala "Bootstrap" and "getbootstrap.com".

rjvir said the .com though. getdropbox.com doesn't count, but they managed to get dropbox.com after they raised enough money for lawsuits.