Brand loyalty is fleeting at best, although it could last for decades with some. Those however are the exceptions. There is no brand loyalty today . You're only as good as your last attempt and the world is a much bigger place today with many more options.
Bingo.. If you look at brand loyalty on a global picture your spot on... Brand loyalty for audio equipment well, maybe for a class of 1% that can afford $20,000 plus speakers, I think with the push for high rez and/or music mobility in and around the home, brand loyalty ain't there thanks mainly to the ability to shop on the internet. There are just too many choices in a quarterly changing market for audio devices and music/video download sites that causes that once loyal customer to wonder for that better deal.