Apple’s 5 hour claim is laughable but not as much as I expected. If I wanted to I suspect I could hit 5 hours by making the web browsing test less stressful, but my focus was on real world usage scenarios, not proving Apple correct. Regardless, 4 hours and 16 minutes doing what I consider to be the intended usage model of the Air is respectable.
The 4:16 result came from a test with web pages being frequently loaded while iTunes plays music — a pretty reasonable test. I’m curious how this jibes with Jacqui Cheng’s inability to coax more than 2.5 hours out of it.