Just checked mine, and it seems to be the same for the surround stereo system. (And the non-glass canopy, but that always sai Q4 availability.) Both options that I want, anyway. But I understand the frustration if you don't want those options. My guess is since that's all standard on the GT, it makes it easier to transition over to Touring production if they don't have to make that change? I have no idea how car assembly works, but it would make sense to me that the fewer changes along the line that need to be made, the easier.
Also, it is better for profit, of course.