It was the drivers doing it. Some cases i was seeing maybe 306 or 304 on the telemetry. The 313 and 314 were few and far betwteen. Maybe they were under pressure and couldn't bother to use the fin wing.
Exit on the penultimate turn also depends how much speed the can build coming down the stretch.
What i also noticed on the telemetry is that the driver's left foot was always on the brake pedal, even on the straights. This suggest the snorkel is operated by the arm or the knee.
The brakes were at 2% by default. Which either means the displacement sensor was offset at this value, or the driver was resting his foot on the brake pedal on the straights, he did not move it over to a hole.
About the downforce. I think being in the top 3 with speed means that they have good down force, but not ungodly downforce like the redbull.
They should naturally recover more downforce when they switch back to the original engine cover in Melbourne.
I don't like the Mp4 24 like engine cover and i believe it adds drag, and takes off some of the pressure off the floor area ahead and between the rear wheels.
The nose snow plow can also be improved, floor edges and the diffuser as well.
I have some ideas for up grages i am going to draw up. Maybe Mclaren could use some of them.