That is absolutely, utterly subjective and anecdotal. I think blaming Google for iOS 6 adoption not being (even) quicker is grasping at straws that in all likelihood don't exist.
"The Dec. 12 reinstatement of Google Maps on iOS has apparently been enough for some of those reticent users to finally make the upgrade to iOS 6. After achieving 10 million downloads in the first 48 hours available, MoPub, the San Francisco-based mobile ad exchange that monitors more than 1 billion ad impressions a day and supports more than a dozen ad networks and 12,000 apps, says there has been a 29 percent increase in unique iOS 6 users in the five days following Google Maps' release on iOS.
"
BTW, not "blaming" Google, if anything, I would be blaming Apple for having a sub-par map application (As a frequent international traveler, I can tell you it's still not up to par with Google's maps) - but I'm not blaming anyone. Just recognizing it was a pretty significant issue for many people.
Given I've also known a few unrelated people do this, I believe your blanket dismissal foolish when it's simple to falsify the thesis: check iOS 6 adoption after Google Maps was released.
