by Part-Timer » Jul 25th, '10, 19:20
I tend to agree with those performers who say that it's much better for the performer to read out a prediction, because they should be better at timing and maximising the impact of the revelation.
However, in this case, I think it might be better if Susan reads it out. You would say something like, "Susan, before you and Mike even played this game, I asked you to read a prediction [or whatever you're calling it Mr G]. For the first time for Mike and everyone else in the audience, will you please read that statement out loud."
This reminds people that she read it beforehand and that there's no way you switched your prediction. Obviously, people should remember what happened, but why not make it clear?
Susan's reaction will be the first part of the revelation. When/if she reacts, people should have an idea that something has happened, but they might not know what (again, it depends on whether you've made it clear that she read a prediction). I think in this instance, having her read out the prediction helps to distance it from the performer. Of course, some would say that it's best for the mentalist to be in the limelight the whole time.
However, without knowing the whole effect, it's hard to say. I don't think there is an unshakeably correct answer anyway.