Awesome.

You're fallaciously generalizing from an application-specific model (Rallying).
 

Flat is best, except for dragging. However, 'flat' is a function of things other than 'equal' fender gap - typically the if a car is flat, it has more gap in fromt, as the wheels must be able to compress while turned, where the rears aren't designed to accomodate wheels turning.

Rally cars require greater suspension travel in front. But otherwise, I don't know why you'd say so.

Shweet! Would be great to have the Avant in the US.

Nope. Not for me. Why even waste money on the tires?

Front engine 4WD cars work better having the rear squatting ever so slightly. Why else would
 

rally cars be set up this way? If you watch a rally car in action you see how the rear is squatting while being pivoted around behind the car's center of gravity; the engine. You can apply more power through corners. It looks wrong standing still when compared to a RWD M3, but it IS FASTER being set up this way. Its about weight distribution and how best to use it given the layout of the drivetrain and motor.

Damm.. looking good..

I think you mean center of inertia, not gravity. Regardless, that's rallying.
 

When the engine is up front, and the front is the first to hit the bumps, and frequiently to hit the ground after becoming airborn, you need a lot of suspension travel to absorb the impact.

the rear is lower because it can be - and thereby it helps lower the center of gravity, whereas the front must have sufficient travel to absorb bumps and jumps without upseting the composure of the chassis and blowing out tires and bending rims when the front suspension slams the bumpstops. As much as it is about physics, it's equally about protecting the machinery from the extremely harsh use/abuse brought on in a rally race.

See also: desert 'ultimate/unlimited class' racers (IIRC what they're called). If you've ever seen what runs in the Baja races, you'll see what I'm talking about. Lots of front suspension travel.

The same physics apply and are concerns in rallying.

However, roads racetracks with smooth surfaces and comparatively gentle elevation changes don't bring those same considerations.