Earlier quoted context omitted.
That's not what he was saying. His point was that he was waiting for Facebook to make their pre-emptive response to Circles, and then FB released Groups. He knows full well is solves a different problem - that was the point of what he was saying. Not only does Groups not really do the same things as Circles/Lists at all, but Facebook appears to think that Lists don't work. Zuckerberg: Just take friends on a site, and…
Lists don't work and Groups are not a response to Google+ Cirlces.
Lists (in Facebook) suck - they UI is hidden and terrible.
Facebook Groups came out when the author expected Facebook to respond to the concepts behind Google+ Circles. It turned out that it wasn't a response to those concepts at all, and was something unrelated.
(BTW, it's not me down voting you.)