The testimonials were a bit weird, esp. since they came from people who presumably weren't using the framework. Once we all realized this was a YC thing, what happened was quite clear. YC and YC partners was throwing their valley knowhow and marketing heft into "selling" a framework in a very early stage -- and very successfully, given the wide interest it has sparked and the $11M they've just raised.

I think this is a bit of a wait and see game, since this is experimental on a number of levels. On one hand, YC has started selling certain companies before they are ready on the basis of super-smarts and presumed future output. VC is willing to put in cash and see what happens. Everyone wants a piece of the next "Rails" and to create an ecosystem there, although probably no one is exactly certain what it will take to gel.

In short, I'd say that the red flags are justified, but also it is cool to see the potential ecosystem for an open source project go from zero to sixty in a few seconds because of YC and co. From the moment I'd like to give them the benefit of the doubt and hope that the hype is for real. The world could use something better than rails and a slick Javascript MVCish framework would be very nice.