True, but not very interesting.
I happen to think both were fairly innovative. Both viaweb and YC were at the forefront of a newish idea that seems pretty obvious in retrospect: Server based applications, and startup incubators. Both existed before to some extent, but pg recognized their value pretty quickly, and did them both well enough to make an impact. (I'd learn toward more credit incubators and less for server-based apps, but whatever.)