Yep, RTM is basically also known as a 'Gold' release or essentially the same thing end users will get - minus marketing materials and other assorted items that come along with a final consumer release.
They should not have called it RTM if it wasn't really RTM.
Other companies are not the point here though. Microsoft is and they have been consistent in their use for the past two decades or more so why the sudden change?
They should not have called it RTM if it wasn't really RTM.