You're correct, at global scale it's still peanuts (and of course it's not a single server but redundant clusters of servers).
I have a problem at your math though, I'm guessing with the overhead and the pretend-IE headers it could be a whole Ethernet packet (which can be up to 1,500TB/day, but realistically it could be around 500TB).
My maths fine, I was comparing it to the comment suggestion of sending "1" instead of "Microsoft Connect Test" as the response body. The headers should be the same.
But I guess you could say the content length header would be 1 byte longer in the double digits length contents (which it is).
