Ignoring that the submission title doesn't accurately reflect the original title, and even though you might be right, I'm having trouble understanding your decision to cite a 2004 post by user "Rommie" of the Urch forums as an authority on American English.
<nod> I wasn't asserting that you were wrong, only that the user to whom I replied that implied the author of the article used it incorrectly was wrong in his assertion.
I'd wager "learning how to properly use 'learned'" wasn't one of them.
http://www.urch.com/forums/english/9214-learned-vs-learnt.ht... "The descriptive answer in American English is: There is no such word as "learnt". Use "learned" always."