> Whether "C++10" or "C++0xA" wins out (or, indeed, C++0xB) is
NOT "C++0xA". The "x" is a wild card which under normal expectations would be replaced with an element of [0-9]. The joke is that since "C++0x" is taking so long. We (they) will keep the implied promise of a first decade delivery by extending the membership of the wildcard to [0-F] (hex).
That means that if you replace the "x" with an "A", you write it as "C++0A" not as "C++0xA"!.
In any case (as pointed out elsewhere), the name is not the real name for the language. It is a joke. The "official" non-real name will surely be of the form "C++1x".