I think, for me, the most interesting point in all of this is the one summed up in the following two comments:
NicoMoreno wrote:Interestingly, Harry is pretty careful to say that he doesn't do glottal "stops".
bradhurley wrote:Not everyone views a stop as an actual stop, as we've seen in Harry's case, but I think it's fair to say that breath articulation plays as important a role as finger articulation for many flute players.
I had forgotten that Harry preaches this 'pulsing' effect. I had a few lessons from Harry a few years back, and they really helped my playing. His idea - if I have it right - was that you needed the glottal for articulation, but that it was important not to stop the flow of the sound. The stunningly good rhythmic playing that he achieves shows that it really works.
I never achieved the same sort of thing myself (a continuous flow of sound with rhythmic pulsing), but trying to do so dramatically improved the rhythmic sense and drive in my flute playing.