My MBP is a couple years old and runs like a champ. You know, with every product released, someone's invariably going to be the outlier... you know, the guy wh

My MBP is a couple years old and runs like a champ. You know, with every product released, someone's invariably going to be the outlier... you know, the guy who buys a lemon, then gets another lemon, then gets ANOTHER lemon. Each lemon probability is small, but even with 3 in a row there's still a chance. Is there a systematic (not just anecdotal) issue with Apple quality? Evidence?