You mean, like he did in the bit where he said: "Finally, even for RAM calling 2^30 bytes "1 GB" isn't really proper; instead, the IEC binary multiplier prefix "Gi-" should be used."
First, that doesn't refer to the parallel naming schemes, it only criticizes use of "GB" as an acronym.
Second, it's not specific enough -- the fact that two parallel measurement schemes are in effect is the answer to the question he asks in his title. That deserves more than an offhand, incomplete reference.
http://en.wikipedia.org/wiki/Gibibyte
1 gigabyte = 1000^3 (10^9) bytes.
1 gibibyte = 1024^3 (1,073,741,824) bytes.