I was talking with a French horn player friend about lessons with my teacher and happily explaining that I am playing at a whole new level both physically and musically. My only frustration is that when I play for him, I never play to the level that I did during the week in the practice room. My performance does not seem to reflect the hard work and success I have when playing on my own. For example, I will miss notes well withing my range or flubb slurs in an Etude (today it was Herring Forty Progessives #22) that are well within my capability. So, it sounds as if I did not practice enough. I actually talked about that with him today and he said that he understands and that it is very normal; it's OK. My French horn player friend said that her teacher told her that students play 30% less well when they are will their teacher.
Have you guys had that that experience.