My best guess as to why some t's might lose patience somewhere in the 2-3 year mark is because they had an expectation of what they thought the journey would look like and it isn't going that way... so ... Is that insecurity or a sense of failure or burnout? I don't know, very possible..

Could it be some on the client's side? also possible. While counseling is different than teaching or mentoring, I can relate to the feeling when I have tried to coach/mentor someone and somewhere after the 18-24 month period if that person is still coming to me with the same types of things and not appearing to be learning or changing (growing at the rate I expect) - I get frustrated. With that being said, I am not a trained therapist, I am not a trained teacher... I am in IT. So, like all of this type of stuff, perhaps I am just projecting my own stuff here.

Then you get to basic ebb and flow of relationship/team/group dynamics. In general, after 18-24 months the comfort level between people changes/shifts. I think about this in terms of co-workers and work teams. People that you are friendly and to some degree may feel like you know on a certain level but don't really know all the details of their lives. After working with them for a certain amount of time, you start to relax in how you communicate and part of the real you starts showing through. So maybe what some people are seeing is more of the real t with those t's that maybe have a significantly different personality than what they present in therapy.

All of this is just speculation...food for thought. There are no facts, no studies, no anything to back me on this ... so take it as a the ramblings of someone going through the process with their own neuroses. It has just seemed that those people here on PC that have been struggling with their t.. seem to be at about that 2-3 mark. So maybe it has just taken that long for the clients to realize that the pluses no longer outweighing the negatives that might have always been there.