Apparantly Google seems to think so. I've been a cheerleader for this group buying concept for quite some time. I even turned a Baltimore area green cleaning company from my BNI group onto Groupon and Living Social which turned into over $20,000 of much needed cashflow for his business. It is a great concept, they have sustained amazing growth and obviously tapped into a need that the marketplace of consumers have embraced since Day One.
But is a 2 year old company with a clever mascot (a cat) and a ever growing opted in email list worth $6,000,000,000? Google thinks it is and I agree with them.