Look, man (or whatever you are), I’ve about had it up to here with your topically irrelevant, debatably incorrect, smarmily prescriptivist grammar-correction posts. Seems to me that each and every time someone dares to use the term “media” with a verb conjugated in the singular, you get your panties in a bunch and cannot resist chiming in with a brief message chastising the poster for his shocking – utterly shocking – butchery of the English language. Sometimes you even provide authoritative references to back up your anal-retentive behaviour. Like the internationally-renowned English experts at C. Johnson Enterprises Ltd.com, who spell “Latin” with a lowercase L, insert extraneous spaces inside parentheses and quotation marks, and freely mix hyphens with en and em dashes. But hey, they condemn the “media”-as-singular usage, so they must know what they’re talking about, right? Or how about this online English quiz you reference, which actually admits that “our language seems to be moving toward the acceptance of ‘media’ as a singular collective noun”? Did you not read that far down the page, or have you made it your life’s mission to halt and reverse the natural progression of the English language by self-appointing yourself the SDMB Grammar Police?
In case it hasn’t dawned on you yet, English, like all natural languages, is in a constant state of flux. We borrow extensively from other languages and anglicize their words. Once upon a time, “opera” was a plural. So were “stamina”, and “agenda”, and “zucchini”. Nowadays I doubt even someone like you would insist that we make a distinction between “opus” and “opera”, or always write “the agenda are” instead of “the agenda is”. “Media” as a singular noun has long been attested in formal and informal literature, going right back, according to the OED, to its very first known usage in 1927. Other descriptivist dictionaries, such as Merriam-Webster, confirm this viewpoint.
Sure, no one’s going to stop you if you want to be a pretentious git and insist on writing things like “octopodes” instead of “octopuses”. But don’t go around correcting people as if they don’t have a clue how to speak their own language. Many of us know damn well that “media” is properly a Latin plural, but we’re speaking English here, not Latin. Until the Chicago Reader mandates that all SDMB posts follow the GPO Style Manual you cite, don’t insist that the rest of us use it.
Oh, and as far as empirical evidence is concerned, Google returns 759 000 hits for “media is”, but only 465 000 for “media are”. I’d be surprised if the proportion would be significantly different for any other modern-day mixed-genre corpus.
You’ve lost.
Get over it.