I am not sure that there is a way to really tell whether they are in tune or not in regards to future predictions . Some readers are amazing at picking up the present and past but get the future wrong often. I think if the reader gets the present and past right I may expect the future prediction to be a bit more reliable, thinking that's a sign of a true connection, but it's never a sure thing. I guess the only way to know for sure is to just allow time to pass and see if it's accurate later. I never read with the same reader repetitivel y, I always wait to see if their predictions were right before I consider going back.