[codinghorror]

It isn't something new, it is a strongly specified, highly compatible implementation of Markdown. As seen in "common" use on large websites. And any implementation that passes the current spec tests can also brand itself with CommonMark or "Markdown compatible".

[kristopher]

Mr. Atwood, you may be too kind. I see this as a chance to bring Markdown to a larger audience by not only standardizing it, but also renaming it as well.

In this endeavor it would appear that you are giving too much credit to Gruber. It is unfortunate that he was not one to be more gracious in the matter.