I'd say about even.
Sylvia does this crap for a living though.
The only 'psychic' I might consider to be 'accurate' would be that Dr. Turi guy. Keyword being 'might' since, his predictions are freakin vague too. At the same time however, his 'vague' predictions does have dates to them, and so far, most of his 'vague' predictions have come fairly true too (example of his predictions, an 'explosion' hits on so-and-so date. That date rolls around...and what happens? An explosion happens in some place. Same with say, hurricanes on a certain date, and boom, a hurricanes happen on that date).
But again, since he doesn't say where, gives him a lot of room too.
At least he isn't Sylvia Brown though who has more concrete predictions.