Perhaps I have more faith in PG's judgement than I ought, but that strikes me as excessively cynical.
I'm guessing you didn't like the post (note, it's not really an 'ad' as you stated) for some reason and are coloring the entirety of their claims with the same brush.
I'm guessing that, bravado aside (and I didn't personally find anything particularly braggadocious in the post to take offense to,) I would wager real money that their claims were at least truthful.