The iPod on shuffle: truly random, or psychic?

Robaato writes: Stephen Levy writes in the Guardian about the perception of randomness, or the lack thereof, on an iPod set to shuffle. From the article:

My first iPod loved Steely Dan. So do I. But not as much as my iPod did.... I didn't keep track of every song that played every time I shuffled my tunes, but after a while I would keep a sharp ear out for what I came to call the LTBSD (Length of Time Before Steely Dan) Factor. The LTBSD Factor was always perplexingly short.