Yes, he will shift GP style now (upside down pattern). Could I offer a suggestion? Try flipping both levers on the brake side so that the rod is on the bottom instead of the top. It should give you a little better brake control. With them flipped, the rod is being pulled instead of pushed. It should be a little stronger in that direction, less tendancy to warp under pressure. If it doesn't make a difference you'll only be out the 5-10 min it takes to try it.