Hi,
I can not answer that ... but of the 2 teachers I have had a couple of lessons with, it surprised them that I was able to pick things up, and add something or other in some spots ... not accidentlaly mind you! ... that surprised them.
I do not know why, or how ... I only know when I hear the notes while playing that I felt that a note was missing in between here and there, and I added an "in between" to smooth it out, and in more than two instances, it was the right thing to do ... but I can not explain that "musically" ... I can only explain that in an experiential way! ... for example ... most "chord changes" are stupid for me, and just dumb (just technique! ... not necessarily music!) ... but if you link them (somehow) so that the "chord change" becomes invisible, all of a sudden you have something else ... and a new opportunity to make the piece different, and often more interesting. How you blend these is another story ... and makes it what it is! The feel of that flow is totally different from a simple chord change, and this tends to add depth to the piece! But it's "harder" to do this on a Chuck Berry song, or a CHB piece, than other pieces of music, see?
This is the hard part about having a teacher for me ... one of them got frustrated, because he only thought that I was not following the "script" and just playing the notes ... and I told him, once, that the music had no liveliness to it ... and he said ... "yeah, but if you can't play with anyone else, it won't matter!" ... but I did not have another lesson with him.
The other two instructors were professionals and had CD's to their credit and they appreciated "touch" when they heard it ... I simply could not afford more at the time.
It's hard for me to discuss instruction ... in music. I can only compare it to theater and film, but some folks here don't like parallels that might suggest their world is too small, and I do not want them to think that way!
What is hard for me, is "combining" the finger location with the sound itself ... since to my ear, that same note does not sound the same all the time, and this makes it harder for me to even learn the simple bruhaha blues ... my ear "floats" and has a tendency to hear more than just ... "one note".
Is it hard? ... probably more frustrating, because I can not locate the point ... where mechanics, are no longer in the way of playing anything, or with anyone ... whereas some instructors think that mechanics teach you the groove, and then, how you gonna deal with it when you have the groove and the mechanics don't match? ... tell the kid he's stupid? This has been my problem, when (even) discussing stuff here!