I think it has to do with which side the throttle is on. I've gotten better about it though. I use the "screwdriver" grip method when cornering and that without practice can be a little awkward when cornering right and having to modulate the throttle.
+1 on just time on the bike. You should ask some of these guys when I first started riding with them. I rode my own ride but I wasn't "quick" at all. A few years later with lots more time on the bike and practicing cornering techniques I am not only faster than I was, I am safer while doing it. Also, keep in mind I had been riding almost 7 years and thought I knew what I was doing, then started riding with guys on here and was immediately humbled. I took it as an opportunity to learn. Cant thank these guys enough.