Afterthought, Why would you want them on a pattern plane if it will affect the higher speed performance though?
You mis-read that description you posted. The slots do not come in to play at lower angles of attack (usually equated to a higher airspeed, but not necessarily). Having the slots on the tips allows the stall speed on the wingtips to be lower than the wing root, reducing the liklihood of a tip stall on takeoff or landing.