I usually make more sure than 'most of x is y' before I claim certain things. This is just hipsterism. Ebay, LinkedIn, Mozilla? Are you kidding?
While in New York I went to some networking events where people said 'I work for a startup', 'How long have you guys been around?', '4 years', 'That doesn't really sound like a startup.', 'I know, but we FEEL like a startup.'... A*holes.