The last discussion of Twitter Bootstrap seemed to end pretty ambiguously.

Is Twitter Bootstrap what everyone should be using to make their MVP when they don't have a designer? Or is it sufficiently non-cross-platform compatible and specific to Twitter's requirements (no jQuery/jQuery UI?) that one should just use another admin theme from Theme Forest?

(Also, Blekko somehow supports grep on its dataset, but doesn't support it without voting? Is this a social mechanism, or does their infrastructure actually work in a way that this is an expensive operation?!)