Aaron Swartz has launched, by my count, no successful products (unless I'm wrong and Reddit wasn't already a success story when he got there).
From Aaron's own web page, here's what I get when I click on his "my day job" link:
http://www.flickr.com/photos/29804691@N02/2786744327/
Why am I being such a dick about this? Because the argument he's making is disingenuous. Aaron advocates for an extended friends-and-family beta before launch. Aaron has no idea what 37signals does to beta and dogfood their product before the "Hollywood Launch". From what I can tell, everything 37signals does happens just before "step 5" in his master plan.
The difference between 37signals and Aaron Swartz isn't methodology. Methodology is a band-aid. The difference between Aaron Swartz and 37signals is ability to execute.
Here's a much better writeup from a much more credible source on the same topic: