They could have called it any number of other things that don't make the same claims that "Standard Markdown" does. Off the top of my head; Common Markdown, Clean Markdown, or better yet don't actually use the Markdown name, simply imply it such as Forkdown or Sporkdown.
It would be best if the team would just go another route entirely.
To be honest, I think this industry wide devotion to Markdown is hilarious, since to me it's a pretty garbage way of solving an easily solved problem. The main/only thing in its favor is its ubiquity.
Whatever you may think of Markdown (that is markdown as created by Gruber), it surely isn't unreasonable to suggest that if any version can make that sort of claim, it should be the original.
Out of curiosity, what do you think is the better "easy" solution to the problem Markdown is trying to solve?
(btw I'm in the camp that thinks "Standard Markdown" is just fine, though I do hope they get the formal specs nailed down a bit more solidly on the ambiguities discussed upthreads, preferably with some kind of formal grammar)