Ha, I was thinking of that when I typed it. I agree though - I think many of the AGI boosters on HN would be very surprised by how little economic productivity increased thanks to computers and the Internet.
If we measure economic output in dollar terms, heightened competition could result in better quantity, quality, and variety of products, such as shows or software available to an average global consumer, while not raising their expenses nor aggregate income for the producing companies.
Thus, in some market segments, it's possible for real productivity to increase without having a significant impact on economically measured output.