Well, You're right, it could be setup, but it holds true for me on several different bikes. I race lightweight stuff, and use high corner speed. I keep my slicks pretty fresh. Forks/shock sorted by a pro (but I realize they're not perfect).
I'm an experienced, competitive expert racer. Generally, I know that opening the gas earlier prevents front slides and chatter, but if either one of these conditions starts, I can't solve it by opening the gas more.
Does anyone else out there have similar experience? Or am I way off base?