[wbrd]

I taught guitar for three years to groups of undergrads. I noticed that most lefties had no problem playing a right-handed guitar. However, occasionally I would have a student that just struggled mightily and things clicked when they switched to a left-handed guitar.

[leejo]

I went to a Don Ross workshop once and there was a left handed player there doing the upside down RH guitar thing, which was especially impressive due to the style of music and having to play the bass notes with their pinky.