From the article: (it does, however, mention that it's possible that PCM data could be influenced by the different amounts of jitter inherent in all different cables.)
Why all HDMI cables are the same
There's lots of money in cables. Your money.
Dozens of reputable and disreputable companies market HDMI cables, and many outright lie to consumers about the "advantages" of their product.
Worse, the profit potential of cables is so great, every retailer pushes high-end HDMI cables in the hopes of duping the buyer into spending tens, if not hundreds, of dollars more than necessary.
Here's the deal: expensive HDMI cables offer no difference in picture quality over cheap HDMI cables.
So when the salesman tries to up-sell you on $300 HDMI cables that are the "only way to make your new 240 Hz TV work," politely tell him he is incorrect and to move on with the sale.
Or let me put it another way, if you're paying more than $5 for a two-meter HDMI cable, you're overpaying.