We've not had any problems and i've not heard of any.
IMO apple don't need to do anything or pull their act together. Problems or not, they are still going to make a killing. They fix problems as they happen.
I've never had a problem with their after sales, take something back and they either fix it/replace it without any questions.
I took my macbook pro in after just over a year and they had to do £500 worth of work on it, for free.