Now, the question is what "most" means here (by number of publishers, by copies sold, ...) but it certainly doesn't mean "most accurate", true as it might be (or not)
Is it wrong to insist that we reserve the title of a work for its complete and unabridged editions, or at least view them as preferentially deserving of that title? There is nothing stopping anyone from publishing an abridged version of Tolstoy's War and Peace, and indeed at least one abridged English translation of it has been published (and it would not surprise me if abridgements in other languages, including the original Russian, were available as well) – but let us not pretend that an abridged version of War and Peace is the same as the original, or deserving of being passed off as it unmarked – and suppose that abridged versions of War and Peace ended up being printed far more than unabridged versions were, would it then make sense to argue that "Tolstoy's War and Peace" (without further qualification) now referred to an abridgement instead of the complete original? But, if one objects to that, does not the same logic demand that one object to abridged versions of the KJV being presented as "the KJV" without further qualification? A complete and unabridged edition of a work is more deserving of its title (without qualification) than an abridged and incomplete edition, and that applies no matter what text we are talking about.
The statement in question referred to "modern KJV" and the absence of a dedication to King James should be a rather good clue that it's not quite original.
And many (but not all) of the abridged versions keep the dedication, even while removing the Apocrypha and original translator's introduction.
Going back to my example, if abridged versions of War and Peace outsold complete ones, I don't think it would make sense to claim there was such a thing as the "modern War and Peace" which differed from the original.
The introduction to the Oxford World Classics edition says that if they had omitted the Apocrypha from the KJV it "would have unnecessarily mutilated what is probably the world's most longstanding best-seller" (page xxv, my emphasis). I think they are right – a KJV without the Apocrypha is in a real sense a mutilated KJV.