Ha, I didn't notice that. But I've heard it before on the K list. I think it is more of a backronym than a serious statement. This is a guy who names his source files a.c, b.c, c.c, ..., z.c.
I'm unsure why Ken Iverson named the J language that though.
Lol. It's actually just the letter after J, since K was supposed to be the next in the APL-ish family.