From Mark Guzdial's ever-informative blog:
I just got a report...on the state of the Python CS1 market. The market size is estimated to be about 20,300 students per year, up 45% since last year. The market has had around 40% gains for each of the last three years.
Yay! But I wonder what they count as "the market", and how big the absolute share (as opposed to growth) is... Anyone know?