Interesting points; I'll certainly keep them in mind.Charlie99:Being somewhat of an air-sipper, I've fudged a bit sometimes. Rather than make a newbie insta-buddy feel self conscious about his air consumption[...]
I often do SAC numbers with newer divers I'm diving with (to start them on the path to thinking about gas planning), so there's really no point in trying to hide anything -- they're going to want to compare. When I've been diving with a self-conscious air-hog (J.'s parents, for one... er, for two?), I've also made a point to give the "breathing your tank fast isn't a bad thing, but trying to breathe less will give you a headache or even hurt you" speech, followed by the usual "don't worry; you'll get better, especially once we fix your weight and trim" pep talk.
(J.'s parents are actually quite looking forward to my parents' pool getting cleaned and running, as they really want to come over for the whole weight, buoyancy, and trim boot camp I put J.'s older sister through. Apparently, the pep talks and our much more relaxed diving has them ready to improve themselves. )