Make sure you flip it a complete 180 degrees...it's easy to get it wrong by a couple of teeth, make sure you test it somewhere safe and lowspeed before you go tearing it up. I did it to my 600 and didn't really care for it, maybe I should have given it more time though.
its now 1 up 5 down
I tried it for a week, but it just drove me nuts, i keep doing the opposite when I need to shift in a hurry. So when it came twistie time, I just couldn't handle the apprehension of going into a corner and not for sure which gear I was in because the wrong one could get you in a world of hurt. I don't race enough to care. If i was in a circuit I might. But personally I tried it and never liked it.
i was almost 3 years of normal riding, but you shouldn't be shifting in corners anyhow. I will say i've entered one at the wrong gear b4 or didn't realize how long the corner was and have shifted up, but thats REALLY rare. but its not just easier to shift, its a safty factor because you won't drag your foot and wreck if you try to shift.