It costs me less than $5 with my current configuration (which is also a global CDN). It's way over our "soft limit", but it's an awesome site so I don't care. The important part is, I don't have to care.
This isn't about slightly more expensive tacos. It's about spending $560 on tacos instead of $5. "Meh" wouldn't exactly be my first reaction to getting that bill at the taco cart (or the fanciest taco place in the world, for that matter).
I can get IP transit in datacenters from $240-$600/Gb right now. So even his $960 transit cost for datacenters is off by quite a bit. He's comparing with a pretty high price and it still looks ridiculous.