You're not really countering what he said by naming something in the 5%. Yes, there's slightly different string behavior when working with unicode, most things return iterators instead of lists, and print is now a function.
Going from knowing Python 2 to 3 is far easier than going from not knowing Python or programming at all to knowing Python 3.
Going from knowing Python 2 to 3 is far easier than going from not knowing Python or programming at all to knowing Python 3.