It's still pretty true for the App Store. Apple hit the $2B paid out to developers mark early this year, IIRC, which means about $1B of revenue for Apple for the entirety of the App Store's existence. Their latest quarter saw nearly $30B revenue, so it's still a pretty tiny part of their business.

Apps is a special case were they make a nice profit from both selling apps that they haven't created and selling devices that run said apps.