I agree coding is about thinking. I've worked for Apple, and written a GOTY game, but I don't know how I'd react if asked to write code in such an esoteric system. I could talk through the concepts, and you could write the code. Cheers!
Then perhaps we don't fit each other, which is fine, and isn't finding that out a good result of an inteview (that you don't want to work with me? - instead of starting and then beeing unhappy - IMHO not enough candidates evaluate the company and their future manager in interviews)