1) Fair enough. I just liked setting up the story.
2) Well, I didn't define this in the article, but my definition of a bubble is a collapse of liquidity due to over-valuation and outright failure of companies. In this case, I don't feel like the over-valuation is as dangerous because the few startups that IPO will be successful, profitable companies for a long time. Also, companies that are likely to outright fail are much less likely to IPO nowadays.
3) I should have included more outright evidence, but just look at the tweets from #500Strong and '500Startups Demo Day' yesterday. They give very positive feedback about the companies launching there, and this is par for the course nowadays. Upwards of 20 companies launch at a given incubator's launch day (YC now has over 40), and almost always they are lauded more than criticized.
We're working on a flash-sales site with a focus for launching new products (rather than selling overstock of old products). We want to give small merchants and designers a captive audience to get those first early adopters. We currently have a landing page at http://www.Trisse.com
That said, I think that the majority of them simply lose their investors money, so it's not going to harm the economy at large.