I don't know. Are most of the people that gets laid off prime material for startups? I don't
think so, but I might be wrong.
I think you should look at a more technical factor. Right now, it is looking better for startups than ever. You have programmable mobile phones, clouds at Amazon and Google, fast Javascript in browsers, computers so fast that interpreted languages can compete and so on. Combine this with the webs ability to reach a massive userbase in a short amount of time. In short: The toolset for startups has never looked better than this. The idea-space on which startup ideas thrives is just getting wider and wider.
Also note that most companies do not get it. The work they want people to do is horribly boring. People have, via the buzz, realized that taking the chance with a startup might be more interesting. Even if they don't succeed they have tried. And here is the killer: they might have failed, but they have learned more compared to a "common" job.