Some anecdotal evidence that its not just YC startups. My company, NewsCred, raised a seed round of approx 1M this summer. We raised it from "top tier" super angel funds. We are not YC, and were not even based in the US. We also were not serial entrepreneurs, although I'd like to think that we're "above average founders!"

Long story short: we did not give up any board control but did not worry too much about price. We got a fair valuation, but nothing crazy.