There are millions of dollars being spent on brand advertising for various domain names - pretty much every one of them ending with .com. That is a powerful marketing machine behind one TLD...
It's strange to me that people seem to want the average age of the start-up founder to be low...why is it more fun if the founder is young than if they are in their 40s?
As a side note, there are some insightful comments that point out the differences in the two data sets that the writer is referring to (a study vs. anecdotal evidence from VC Fred Wilson). But it's an interesting read, none the less.
There is nothing more annoying than a company that makes you jump through hoops (complex registration system) to get something that they want from you (your comment, which makes their post/site/life better).
This article reminded me of one that I read over at The Industry Standard (http://www.thestandard.com/news/2008/03/18/keep-it-simple-be...) - Keep it simple, because VCs are stupid. It's a really good point that every founder should keep in mind that they know their business FAR better than the VC they are pitching. They should enter every meeting and discussion with that in mind.
Seth's point is so right-on - setting yourself up with a rich Internet history will go a long way in securing your future. Start with a blog - or a twitter stream - or a Tumblr - but start NOW.