By generation he means in this design revision - this air is drastically different to the last one. I owned the first Unibody Macbook Pro, ordered it an hour af

By generation he means in this design revision - this air is drastically different to the last one. I owned the first Unibody Macbook Pro, ordered it an hour after release... I'm on my third motherboard. Sometimes the first batch of hardware has issues fixed later on.