“It has been over a month now that I have used the MacBook Air as my primary machine, and one thing is for sure: it is the best upgrade over the MacBook Pro that I could have made. Yes, I consider it an upgrade.”

I agree. I’ve not noticed anything I do on this laptop as noticeably slower than my prior (faster) MacBook Pro. This is the big difference between MacBook Air generations one and two: the limitations are not nearly so large or obvious.