I'm sure that the venture arm operates independently of main Google -- but it's not like the folks at Google Maps are somehow unaware of the fact that GV sunk a quarter-billion into Uber.
And Uber is one of the, if not THE, biggest investments GV has made. They have $1.5 billion in assets, according to Wikipedia (http://en.wikipedia.org/wiki/Google_Ventures). So 1/6th of all their assets is Uber. Which means that asking whether other GV-invested companies have experienced easier Google integrations is not all that meaningful -- Uber is an outlier.