Well, I'm guessing not that
many are using Pyret as a first language (yet) either... (Actually, I think a few people are still using Squeak to teach kids programming, so that's not even true)?
Anyway, I was more curious if you'd done such a study because
a) It's a very concise and consistent syntax, and
b) with all the great work that appears to go into Pharo Smalltalk it would seem to be viable option (again).
And yes, I do mean for computer science (not "just" programming):
http://www.lukas-renggli.ch/blog/petitparser-1
http://www.squeaksource.com/OMeta/
(This in addition to the nice design of Smalltalk-80 - and no, of course it isn't perfect -- is any language)