I think it's no accident that the majority of these companies were funded by YC. Not <i>specifically</i> because of YC (although I recognize the value and bragging rights that come with YC), but because smart investors are recognizing that it shouldn't take $20M to get most Web2.0 type companies to a momentum stage.<p>IMO, it's taken until about the last 12 months for the VC and Web2.0 markets to realize exactly what the investments and expectations should be set at.