The fact Vista is number one invalidates this guy as being credible. He hopped on a bandwagon here. Windows 98 and ME had huge problems. Vista was just ahead of it's time. If you put Vista on a box ready for Vista it's a solid platform and as good as it gets. The fact people think Windows 7 is everything Vista wasn't further proves the point. The difference between 7 and Vista are so mall I don't even know I'd call it a service pack as much as just the natural evolution of the code base of Vista combined with user feedback.
Vista is tight. Windows 7 is just a tuned Vista. This guy completely invalidated himself by picking Vista as #1. He jumped on the bandwagon and lost credibility. I've been using it since SP1 on 3 machines "Built for Vista" and it's been brilliant. The UAC hardly even comes on at all anymore and when it does I'm cool with it. This is is someone's tool that just spewed what he thought would draw the most Google hits by article keywords. If you search rank on the 10 technologies he chose they are huge.
His list is the most SEO list I've seen and that's all I give him. That and oh yeah... he's a tool.