I wouldn't bet much on KYM's provenance research. Memes spread so far so fast on the information superhighway, those that started on some Korean photography forum or Russian anime newsgroup, you'd never know if you weren't there ... or know where to look. KYM often cites 4chan because it's popular, in English, and well-archived (ironic indeed) and KYM editors will take the earliest hit from the third-party archives as provenience, when the archive itself might be younger than the meme.

You can find discrediting examples in the mid-2000s thread collection the internet archive recently released ("archive ten billion"): memes appear in the chanological record years before they anywhere Google knows of. But how can you know that's the real origin? Even "Know your memes" first appears in there as a /b/ catchphrase in April 2006, but you must notice that's also when the /b/ posts in the collection begin.

Edit, another example:

4chan is also known as a Mongolian basket-weaving forum, among other things: corruptions descended from the meme of referring to anime as "Chinese cartoons". An old 4chan saying, as KYM finds? No, it came from that Russian anime newsgroup, ru.anime.chainik, after its parody FAQ from 2002 was translated by users of an associated LiveJournal group and added to a since-deleted Uncyclopedia article.

  Q: Что такое аниме?
  A: Китайские порнографические мультфильмы.

The full FAQ is on the author's website, which is still online, shounen.ru/anime/tech/afaq.shtml But is it entirely original to that newsgroup? Some of those terms seem to have come from FIDO...

4chan is the America of the internet, the only reason it has outsized influence is because ideas were allowed to incubate.

Most memes and ideas went no where but some had a chance to multiply without getting stamped out by the censors.