Hi Psyclon, you're of course completely right. But if you do what you've described there'll be no sound present above 22.05 kHz (half the sampling frequency of the CD file format). The spectrals of the fake Music in the Ear, however, show frequencies up to 24 kHz. In this case it is therefore indeed impossible that those files should have come directly from CD, even after upscaling the sampling frequency.
I've now amended the first sentence that you cite to make the statement unassailable. Thanks!