Tony, I'll be interested in hearing what you find out. I suspect it will not be that the frets are too high. I just had my guitars refretted, with higher frets than the factory used. I find it noticeably easier to play now. I can now do some barre chords that were impossible for me before. My understanding is that ideally, the fretted strings never touch the fingerboard. When the frets are too low, the strings will bottom out on the fingerboard, and if they're buzzing you're sunk--you can't go any further.

I realize that if the frets are too high and the strings are squashed down as far as they will go, it can stretch the string and alter its pitch. It was explained to me that the idea is to press on the strings just enough to get a clear tone, which is less stressful for both the guitar and the fingers.