"Apple, Google and Symantec are among the high-technology companies with the most loyal customers.

Apple, whose score far outranks its closest competitor, is well known for its passionate and dedicated customer base. Google's high Net Promoter Score establishes it as a clear leader in the emerging market of online services, with corresponding strong performance in share price."

http://www.macnn.com/articles/06/07/11/apple.google.find.loyalty/

I'd expect that from them.