Google began letting webmasters who have deployed app deep linking know about app deep linking issues and informing them how to fix it.
Now Google is sending webmaster stats on their impressions and clicks via email as well. The emails currently have the subject line “your app in Google's search results: here are this week's stats on clicks and impressions." The email further provides a grid by day for the past week of impression and click data. Here is an image from Andrea Pernici who posted the following on Google+.
Looks like Google is really pushing app deep linking.Google Notifies Webmasters About App Deep Linking Impressions & Clicks!,