I think I made my views on the paranormal clear enough in the thread Ed linked to. For this thread it's enough to say that I agree with Naomi and others, albeit for different reasons. Few people can genuinely believe in psychics "on-demand", firstly because as soon as there's money involved you should already be suspicious. Secondly, it would be in a claimed professional psychic's interest to be able to advertise that they were the only "scientifically verified psychic". Imagine the publicity that would give! And it wouldn't be ignored, either, as even if the scientific community might remain sceptical (was the test done properly? etc.) the media would trumpet such a result.
At any rate, such a claim would be massive and, indeed, a money-spinner. However, no professional psychics can honestly make the claim, as all who have agreed to submit to such tests with agreed conditions have failed them. We can certainly say that psychic abilities cannot be called up on demand, if they exist at all. Be intensely sceptical of anyone who charges money for such a reading.