I agree with the OP, but keep in mind that the new theme is not just the Release Preview theme without transparency. The window frames are different. The taskbar is also different (no more smoked corners at the left and right of the taskbar and also no more blur effect). It looks much simpler now. Oh, and the theme is still called aero in Windows/Resources/Themes.
I KNOW that the RTM theme looks really different, including different close/minimize buttons, Window frames, taskbar, ribbon, etc. However, those have nothing to do with the point of the thread. The look of the ribbon won't prove anything about Aero. The screenshots in RP are good enough to explain the point. If someone is skeptical, they can try replicating these in RTM.
Nice to see it's still called aero internally. But the branding is gone. If you open the personalization window, it doesn't say "Aero" themes anymore.