Yea I think you can get an idea of what you might get, but people speculating they will get 165 is hard to say. Are they taking the practice tests right are they given themselves a few extra minutes etc. The reality is the real test is more pressure than a practice. Until you get the real score it is not worth speculating on how you might do. I think if you have studied your ass off and have someone supervise you when you take your practices etc you can have an idea of what you might get. If you get 158-161 on all your practices odds are it will be somewhere around there, but possible a 154 or a 163 and if you got either of those scores it would make a HUGE difference
Tell any admissions committee you were scoring 170 on your Practice LSAT and I guarantee they will say that's great, but let us know when you get the REAL results. Anybody can claim to do great on a practice etc, but when it's real it is real and until the real score comes in there really is no point on speculating what schools you consider.