Someone's phone went off in the "A Nonesuch Retrospective' live recording at 2:28. It annoys me every time, especially since it's the ubiquitous Nokia ringtone. I hope the moron was suitably mortified.
When this sort of thing was original it was fair to label it genius; now, however, most of minimalism falls into predictably cliche traps of imitation and mimicry. As far as glass is concerned, there is a stylistic constant to his music which saps it a bit once the initial (& very intoxicating) allure wears off.