It seems he may have some good points, but he definitely tried pretty hard to make some of the examples ugly. The way currying is generally done in Scala is much cleaner-looking than this, as the first several google results for "scala currying" show. Also, he seems to throw in some extra unnecessary stuff (sealed?) in the case classes example.

I appreciate informed criticisms like this, but he is definitely representing Scala in as poor a light as possible.