I just dug out an mp3 of 'through the fire and the flames' and it isn't just ridiculously fast - it sounds like an old cassette jammed in a car stereo playing it while fast-forwarding!

To test my sped-up theory I played it at 0.7 speed on Windows Media Player - hey presto! The solos sounded less digitised and all the instruments and rhythms sounded as it made by humans not robots.

Am I right?