It is looking as though this could indeed be the case when it comes to the Toyota Prius as we have heard that the car could have been set back by a few months, this means that we will not see the Toyota Prius before coming up to the end of 2015.
The delay seems to be down to the fact that Toyota hasn’t been at all satisfied with the 4th Toyota Prius efficiency. The delay is therefore down to dealing with the improvements in efficiency, but there hasn’t been any official announcement.
If so then the car would perhaps be in production in December 2015 and it could be 2016 before it enters the market. At the moment this is purely speculation of course and we are going to have to wait for the announcement from Toyota.