IMO, there can be some value to reports of escorts in the 6-12 month range. Especially if they have few or no reviews on here otherwise, or if your experience has differed from the consensus. However, little point in adding yet another positive to a well reviewed WG. Beyond that time period, and certainly at three years plus, I don't see a lot of benefit.
Having said that, it is your experience; just consider whether you have anything interesting to say.