| is it an iPod?
many MP3 players have an options to change the speed of "spoken word" files, so you can listen to audiobooks or podcasts faster or slower. i know this is the case with my iPod. i would check out your MP3 player.
i did test the file, downloading fromt he site, downloaded through iTunes, and through ipooder and ipodderx (podcast aggregators), then listen to the file on my computer and my iPod, and i did not have any speed issues.
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