Google has gotten more fast-track patents than any other company – The Washington Post:
Google has gotten 875 fast track patents (about $3.5 million dollars extra in patenting fees $4k extra per app), that is 14% of all such rapid track patent processing in the USA. Prioritized examination.
The plan from Google’s perspective is to get the patents as quickly as possible. (You don’t really own a patent until issued; you can’t really enforce/assert it until you own it.)
This is as of 2013, so it would be interesting to find more recent stats.