Well the splitter thing explains the scraping sounds that we've been hearing from the redbull
What i must mention though is that i think the splitter only brings the wing down to a certain level. When it is at this level the downforce increases further and this increase then bends the wing even more.
It's like the Rear wing on the Mclaren mp4 12c road car. On the road car, the rear air brake is actuated by oil pressure, but it only moves to a certain point. The wing is so shaped that the air imparts to rest of the motion to bring the wing into the vertical braking position. This principle may be what redbull was using on he flex wing. A very pitch sensitive wing that has a certain behavior once it experiences an amount of suction underneath or an amount of angular pitch.