I have worked with a number of people in the industry over the years and have seen a bias against startup founders, more than a desire to hire them. But on the flip side people want to hire engineers from startups. Basically being at a startup is desirable because they often think it bring good qualities (of course evaluating the position and individual too) but being a found brings the concern of them being discontent with the job and leaving to do their own thing again.

I think you have to look at the individual, their specific fit and how old they are.