I think so. If you follow this forum where the owners chat a lot, you will see that most of the servicing and problems are occurring with the older model 2013's. I say most not all.... in case some jump on me. It may prove that in 2017 we will see problems with 2015 model S's, I have no idea on that. But it stands to reason that TSLA is constantly making tweaks and improvements to the Model S, as Elon has stated before. TSLA is a company that doesn't function like traditional car manufacturers, they can change things when needed on the fly. In some cases a car coming off the line last week is different from one this week. That's the beauty and speed of this company that Cory Johnson, Bob Lutz, and many other fogey traditionalists/nostalgists don't understand.