Is "Is a Turing Intelligence truly intelligent?" an intelligent question?
In Turing's time, many a scientist would have answered: 'no'. We don't know what we mean by intelligence, it cannot be observed directly, so it's not a scientifically meaningful term. Let's look at observable behaviour first. This is basically the viewpoint of behaviorism, and it is Turing's own approach to the problem (namely, to *replace* the question 'Can machines think?' with the question 'What would it take for machines to appear to think?')
Blandly to ask, "Yes, but can these machines *really* think?" defies the whole approach! You'd better come up with something more constructive.
(Just my opinion, of course.)