I have felt for a while now that Google Maps does a lot of A/B testing on routes. Probably they inherited this from Waze -- I quit using Waze years ago because it routinely picked a route that I knew would be slower from my experience in the area. So I'd ignore the turn it wanted to make in that direction, and it would re-route on the better path... and the time estimate would drop a few minutes. So it -knew- the correct path was shorter but was sending me the longer way just because it wanted to be sure it was in fact the longer way?