Not 2 years ago, it was at least 90% male.

Although towards the end of the term, it trended towards a balance.

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On review, the article is NOT about what you'd consider CS1

"Introduction to Symbolic Programming was reborn as Beauty and the Joy of Computing."

This is a CS class in the loosest sense of the word.

It fulfills no prerequisites towards a CS degree.

OTOH I could just be cynical, and this class is just what's needed to get more females into the subsequent CS classes.

At least anecdotally, I know a few people who had no real interest in CS start with this class, but then proceed to take proper CS classes they may otherwise have ignored.