I've seen this before and tried to replicate it by taking several different recordings of crickets and applying algorithms that stretch sounds in time domain. (I dabble in audio engineering and digital signal processing)
I was unable to produce anything that sound remotely like the recording, even after trying to, which leads me to believe it's a hoax. I even tried slowing down the original track (because it contains normal-speed crickets), to see if it was just the kind of crickets I had, but no luck…
It's cool, but my expert opinion is that the story behind the song is untrue. Stretching sounds by that much produce much 'smoother' sounds, i.e. check out this Justin Bieber song at only 8x slower:
http://www.youtube.com/watch?v=bidHnEekXpEIt's unlikely that any recording (especially at normal sample rates) would have the time-domain resolution to sound anything like the cricket song once it was slowed down as much as stated in the article. The best I could get sounded like dogs barking in the distance...