Here's something interesting - Steinberg, who observes Holst's own metronome markings for the first movement, which is much quicker than most of the ponderous first movements runs 6:37. Stokowski's runs exactly the same 6:37 so Steinberg isn't alone. I'll tell you add a little natural reverb to the Stokowski and voila. Other first movements that I've now heard run: 7:18 (Boult), 8:42 (Herrmann), 7:12 (Dutoit).