It was very long, but it wasn't all an advertisement. He spent a good deal of time talking about the potential prospects of the app, issues it may encounter (even with some suggestions), and similar apps that have come up in the past that didn't quite make the cut. That's a lot more in-depth than most product reviews go.

I honestly think the wiki entry on the French Revolution(s) is shorter or similar length.

But hey, if you’re that brilliant of a writer, have at it and write about a web app to your hearts content. Never edit anything.