When I was a younger flutist (with seven or eight years of private lessons), I practiced exercises as little as possible (read "almost never"), and spent all my time on pieces - both lesson material and band material. Now that I've returned to playing seriously after a looooong hiatus, I have a different attitude; scales and exercises are the focus - sometimes to the total exclusion of the pieces my teacher has given me.
Since I've started lessons, I spend at least an hour and a half, or more depending on my mood, on a variety of scales, thirds, and arpeggios; T&G; Moyse; and another book I rarely see referenced - Maquarre. I've been playing again for almost two years in the college band, with concentration and private lessons for about the last six months, and I gotta say, the emphasis on exercises has improved my playing by leaps and bounds beyond any gains during the previous year and a half. (and extending all my scales and exercises up to the fourth D has made the normal high-end stuff a piece of cake!)
You all keep arguing about Trevor Wye and T&G, but until my latest incarnation as a player, I'd never heard of either. My teacher pulled out the Maquarre "Daily Exercises" book thirty years ago, and gave it to me almost like a sacred text, saying "take good care of this; they're not easy to come by." Whenever he wanted me to work out a passage in a piece, he'd pull out that book and have me run over this or that, showing how it related to what we were doing at the time. (It may have have been rare then, but I just easily ordered a new one online a few months ago

Anyway, my question to the knowledgeable is: where does the Maquarre really fall in the hierarchy of exercise manuals? Was it another major school of teaching, or just a useful book for some? Is it likely that my teacher was using it as a stepping stone towards T&G or is it possible that, to him, it was like the T&G is to some here - the bible of flute exercises?