I don't think that at all ??? Let me put it this way. Does anyone care about WM6.5.3.1, WM6.6.1.2, or prefer WM7? Why spend that extra time releasing/compiling that firmware as an update when they could spend their time releasing and polishing S^4?
Remember, that whatever they want to release...
Just chatted with a Sales online last night and he said mid September......so probably that's going to be the date since we've heard several whom contacted sales say this.