I'm mostly blown away that he had the app put together in 5 hours. I can't get a development environment set up in 5 hours. I've spent five hours chasing down a trailing comma bug. Teach me, sensei.
Now what I find most interesting is that the author doesn't seem to have a large portfolio of apps. The "More by this Developer" link only shows this app, while his website only points to Discovr (http://discovr.info/) which I can't imagine he's the only developer for. I'd be curious to learn more about his expertise.
For what it's worth, Jony Ive seems to be pushing us to all adopt the design approach of the OP. Wonder if 'deference to content' will become the new normal?
[1] http://blog.fieldforceapp.com/post/32922733018/weekend-proje...