I do not think the Turing Test is a good test for determining whether someone (person or computer) is intelligent. Mimicry is not the same as intelligence; intelligence goes deeper than just being able to simulate a thinking being. I think intelligence must come from within the person (or animal, or computer), and not appear as a result of a program. For example, after Koko the gorilla was taught American Sign Language, she could then create her own phrases; a computer's phrases are the result of a program.
Many animals, such as dolphins and gorillas, are almost universally considered to be intelligent beings, yet they are not able to fool people into believing they are human; one drawback to the Turing Test is that it only measures intelligence in terms of human intelligence.
Another way to tell if a computer is intelligent would be if the computer spontaneously created dialogue, or spontaneously did something no one had programmed it to do. This would show that it could think on its own, which I believe is the true hallmark of intelligence.