Yes it is AI. You could quickly go through the Table of Contents in the classic Russell and Norvig "AI: A Modern Approach book" to see what is considered as AI.

Yes it is AI. You could quickly go through the Table of Contents in the classic Russell and Norvig "AI: A Modern Approach book" to see what is considered as AI. To be classified as AI, the mode of learning (statistical or not) is not as important as the notion of what an intelligent "agent" is supposed to do. There are quite a few definitions/statements of this notion here. One of them (again from the book) is that AI must "act humanly" - which Kurzweil is described as: "The art of creating machines that perform functions that require intelligence when performed by people". Note that the behavior of the AI is stressed, not how it produces this behavior. Machine Learning falls under this categorization of AI (Section 1.1 in the 3rd edition of the book).