Car and Driver has this article about the Ford Focus' claimed torque vectoring (for front wheels), and also compares that to Porsche's system, which also uses brakes to modulate torque vectoring.

http://blog.caranddriver.com/what-to...ited-about-it/

This makes me wonder: will the PTV+ cause more brake wear?

 

The 911 Turbo and S are 4 wheel drive
So only thing i wonder is what else C&D did not get right...

 

Yep, C&D got the drive systems wrong.

Yes, since the system uses the brakes (as does PTM) there will be more brake wear. Still, if I was getting into a 2011, I'd want PVT+. It's cheap for a Porsche option.

 

From the Cayenne product guide:

3.3.2 Porsche Torque Vectoring
Plus (PTV Plus)
PTV Plus is a new system to enhance
driving dynamics and stability. It
functions with variable torque distribution
at the rear wheels and an
electronically regulated rear differential
lock. PTV Plus improves the
steering behavior and steering precision
as a function of the steering angle and
steering speed, gas pedal position as
well as yaw rate and vehicle speed
through selective braking interventions
at the right-hand or left-hand rear wheel.
Specifically, this means that when driving
dynamically into a curve, slight brake
pressure is applied to the inside rear
wheel. As a result, the rear wheel on the
outside of the curve receives a higher
drive force and permits additional angular
momentum in the steering direction.
The result is direct and dynamic
steering into the curve. This reduces
the need for PSM control intervention.
The Cayenne Diesel and Cayenne S
Hybrid feature the sub-functionality of
selective braking intervention in the standard
PSM.
At slow and medium speeds, PTV Plus
considerably enhances agility and steering
precision. At high speeds, during
fast cornering and with spinning wheels,
the electronically regulated rear differential
lock ensures additional stability.
When driving on different road surfaces
and in wet and snowy conditions,
the system also demonstrates its
strengths to ensure outstanding vehicle
stability in combination with Porsche
Traction Management (PTM) and Porsche
Stability Management (PSM).

So to answer your question pepper09tt, C&D failed to mention the Porsche system includes a rear differential lock.

I can't imagine brake wear would be significant, at least not compared to tire wear if the car's being driven hard enough for the system to kick in, at least in the dry.