Amazing analysis by dr Obbs
MCL40 Analysis! At first sight it looks pretty vanilla, but when you look deeper there is a LOT going on here. As usual, this is my best educated analysis without CFD, so it's prone to error. But... Let's start at the front,
Front:
Very aggressive twist to the end plates with the upstream leading edge pointing almost inwards and then twisting outwards. Maybe generating outwash, but I think there is more going on here.
We can see the small linkage for the front actuator totally hidden in the nose, and only the linkage exposed connecting to the third element for straight-line mode. A really clean aero design with minimal disruptions.
The front wing elements are heavily mid span loaded and then back off at full regulation allowed radius to the end plate. This is likely generating quite some upwash traversing through the suspension geometry downstream. Another reason why the push rod configuration is a good choice here.
The diveplane is seen here with a downwashing camber that would generate a small amount of lift. But this has more to do with the vortex system of the front wing. More on that later in the aero analysis.
Mid:
We can now see the complexity of the floor-board of the MCL 40. The lower half of the floor-board consists of venetian blind style upwashing airfoils, while the upper surface is a strake style inwashing airfoil. This works with the outwash created by the forward undercut of the sidepod. This outwash is primarily along the forward floor to the outboard edge. So it makes sense the upwashing elements are here.
We also see just how sloped and downwashing the sidepod is with the big forward undercut. This is just elegance and intelligence in how to manage the forward flow structures maximizing floor edge outwash, and pushing the front tyre wake outboard.
Sidepod intake is pretty conventional. I'd say this is an area of development during the year. The shark fin is notched for discrete vortex shedding.
Rear:
THE MCL40 HAS A DIFFUSER CUT. It's hard to see in these images, but it's there. There does appear to be something in the gap. Likely this is one of the allowed diffuser fences within the body of the diffuser obscuring the full view of the cutout. But it's definitely there.
Also a curious triangular shape to the diffuser winglet. You can see this at the rear of the car. I'm assuming that's the winglet, because I won't think the diffuser sidewall is allowed to be this angled.
Front AERO:
Ok this is the juicy stuff. If we consider the aero of the front wing, I see an intentional choice to manage the complex vortex structure of this front wing. With the downwashing diveplane vortex, the footplate vortex and the diveplane vortex are now counter rotating to one another. This means that spaced apart they collectively create outwash. Brilliant. With an upwashing diveplane these would be co-rating and creating inwash. I believe that this could be the thing that other teams are hiding by not running dive planes in the Barcelona Shakedown. McLaren just pulled the joker out of the bag a bit early.
Now inboard of the front tyre, we can see that the End Plate vortex and the cone vortex are co-rating. Which means they turn the same direction and will likely merge downstream. Or maybe not. Hard to say for sure. But both will create some downwash along the tyre onto the inboard tyre jet. This will help to suppress the jet and keep it small. Hopefully staying out of the floor.
For me, this is a first race spec front wing!! I think the others are hiding some of these interesting bits, but McLaren just showed their hand. The front wings will be all about vortex management to help control the front tyre wake and keep the inboard tyre wake suppressed, and the outboard tyre wake outboard. McLaren has achieved both of these things with this front wing....in my opinion.
Very aggressive twist to the end plates with the upstream leading edge pointing almost inwards and then twisting outwards. Maybe generating outwash, but I think there is more going on here.
I certainly wasn't questioning the authenticity of your information. I understand the benefit of a mousehole in these regulations. I was just pointing out it's not the be-all and end-all solution everyone seems to think it is. 
