I'm mixed.. I think there are some teams that could thrive even without an idea, as long as they are committed to working with eachother when things go rough (which they will).
In terms of talent, I don't think (in all humility) that there were many teams in our batch THAT much more talented (at least on paper we were very very solid). In terms of personality there were mismatches that only came out later when tested by conflict.