It actually applied to ALL coins at some point to a degree - some of the CPU-specific coins might run better on Intel, but Intel's presense in graphics is a sad joke for the most part (even the Haswell and Skylake APUs don't match my 2 generation old A10-5700s on graphic performance overall).
Doesn't apply CURRENTLY to SHA256/Scrypt/X11 coins as the ASICs have taken those over, but that leaves a very large number of coins that work well on AMD hardware (and a FEW that work better on Nvidia).
Well, AMD used to manufacture Intel chips, then went off by itself, so their chips aren't quite intel quality, ever since then. Skylake HD Graphics can beat AMD APUS, but remember that the clockrate of each Skylake gpu varies with the processor. I.e HD 530 is faster in a 7600K(not quite sure it even has 530) but is slower in a i7-6700HQ. Also remember that you're comparing a desktop APU to both desktop AND laptop GPU. Intel still has the better efficiency,core performance, and overall is better with cpus, so it's no wonder they run better on CPU coins. It kind of evens out in GPUland, with AMD destroying Nvidia, but there are a very few coins that are nvidia-centered or something. (2-3, not very many lol)
I had to do a double take for a second two Leo's in a row
. But CPU coins are kinda dead in my view there just is not anything I see as making enough to pay electricity off of. I wish it was not true and there was a good alt. Chances of paying electricity to mine CPU coins are slim... and ROI on CPU chip not even a chance do I see specifically looking at nice chips.
And a lot of the Intel integrated GPU's just don't have enough power to make it worthwhile. Best by far is Ether it's on a heck of a run. And takes a decent GPU those intel integrated that most motherboards have just does not cut it.