The article you linked to talks about the Dell Latitude E6400 XFR, which, IMO, is about the worst laptop you can pick for the "rugged" category.
Here's an actual video that explains why:
http://www.youtube.com/watch?v=CyCETOfy0eI
There are rugged laptops that can stand drops a lot better than that one.
But that aside, not everything is up to pure chance when you have proper protection, dear sir.
And if a jacket + sleeve is not enough to protect a MacBook Air, then... that's that. You can put it up to luck or not, but I'd say... the computer wasn't designed for that.