If Anthony Cordesman is a "celebrity" than Hugh Laurie is a global mega superstar.
Celebrities probably enjoy audio at the same rate as the general population, say, less than 0.01%. Like the general population, a high percentage probably prefers to watch TV and/or owns and enjoys a Bose product of some kind.
My understanding is that Hugh Laurie does like audio - he is much smarter than the average "celebrity".
Mariksa Hargity enjoys music and has a nice system. She is also very smart.
Fabio - if you want to count romance novel "beefcake" cover models as "celebrities" - was a major audiophile.
Rick Rubin - at least comparted to Anthony Cordesman - is a celebrity and he is an audiophile.
I would think high end dealers and/or custom install guys in LA and NY could best answer this question.
Of course, most custom install guys dont know what high end is and therefore might not know an audiophile when they see one.
Cheers,
