Actually, this is true for all Apple laptops. Unbeknownst to many, when Apple designs and engineers their portables, they make sure that it's perfectly center-balanced.
It actually makes sense. These devices really need to be balanced because they would be flawed if they weren't. Imagine shifting the laptop from one hand to the other and finding out the hard way that it's actually heavier then you expected.
Here's my new 11" MBA proving that point: