I can see where it might be harder for an instructor to teach everything "backwards." I am so utterly right hand dominant that I don't think I could make the switch. You may have a point when I mention that maybe there were not so many left handed guitars a few decades ago.
You lefties are pushed to do a lot of things right handed from early childhood, I think. Thus, often a little better doing righty things than righties are at doing lefty things.
Keep on rockin', be it lefty or righty![br][br]
Dave...
It takes as long as it takes unless you quit - then it takes forever and you will never get there.