I only use the search when I know what app I'm looking for. Wouldn't that would drive up the numbers artificially -- as I had the intention of downloading the app before I began searching.
Whenever I use the App store, I'm on a mission. But it's also a mission to get free stuff, so maybe I'm not even part of the equation.
I don't think I've casually browsed around the app store since I got my first iPhone (first smartphone), around 2009 or 10.