There's a lot wrong with this statement, so I'll address the thing that sounds the least wrong.
Have you seen how in-depth the translations on Facebook are? I used Facebook Pirate for three or four months because I was so delighted at how many variable phrases they introduced regarding every small item on the page. It was as thorough a translation as I've ever seen online. (As an unrelated aside, Facebook supports the Konami code, which makes it the most mainstream geek site on the planet, and their Konami code triggers something wholly unexpected and hilarious.)
I don't know Facebook's employee breakdown, but remember that Facebook offers multiple products, each of which is a fairly complex offering. I can see their Photo app being worthy of a large interesting team; ditto Events, Notes, Video, their link sharing, their search (and doing search for Facebook sounds much more interesting than doing search for Google, because you get to play with so many concrete variables), their public pages offering, their iPhone application, and who knows what else they're cooking up. They've also got a unique graphic style that I'm sure a handful of people work on, and there's the usual stuff of marketing and advertising that's fun no matter where it is.
It doesn't seem completely insane to me that working for Facebook might be really fun, even as a grunt. Unlike Google, which always sounds like working there is 90% backend, Facebook has a lot of stuff that's immediately noticed by its users. It's one of the few big companies that I'd actively like to work for after graduation.