Second gen Macbook Air's had Logic board issues, 2007 era RevA Macbook Pros had video card issues, dodgy graphics cards on the early Mac Pros, the iPhone4 antenna, the list is endless. Often it's taken years for the issues to be resolved and Apple to pay for repairs, if at all.
It's simple, if you want the shiniest tech, buy whatever Apple is selling today. If you want reliable hardware, wait for the first revision when the kinks have been worked out. That way we don't all get spammed with the histronics of endless bloggers who think this is a new phenomenon.