Anandtech posted a review on the 2011 MacBook Air (11 and 13-inch)

I've always liked ultraportables. Back when I was in college I kept buying increasingly more portable notebooks until I eventually ended up with something horribly unusable for actual work. When Apple introduced the first MacBook Air back in 2008 I fell in love. It finally stuck a fast enough CPU in a small enough chassis and gave me a full sized keyboard to type on. I was set.

Last year Apple introduced the first major update to the MacBook Air, bifurcating the lineup with the first ever 11-inch model in addition to the standard 13. With last year's update the MacBook Air did so well that it actually started outselling the base MacBook. Apple isn't a fan of large complicated lineups so it retired the MacBook. If you want a portable Mac you can buy a MacBook Air or a MacBook Pro.

As the mainstream counterpart to the MacBook Pro, Apple had to do something about the performance of the MacBook Air. While last year's updates were great alternatives to cheap, underpowered netbooks, they weren't fast enough to be a mainstream computer in 2011. Last year's Air featured Intel's Core 2 Duo processors, based on an architecture that debuted in 2006. Intel has released two major architectures since then.

Just nine months after the release of the 2010 MacBook Air, Apple fixed the problem. Meet the new Air:

  The 2011 MacBook Air (11 and 13-inch): Thoroughly Reviewed