Here you can see the P+ package mounted in the car: 2012 Tesla Model S Signature Performance Suspension Walkaround It is a really comprehensive analisys of the suspension layout, and it also shows how good is the engineering under the Model S. It is much more than the best motor and battery and a beautiful body, this car has been made from the bottom to be the best.
That is the regular Performance Model S, which should be no different than the standard Model S suspension.
No, it is the Performance Plus, it is said explicit in the article, but quoted as "sport package" instead of "performance plus" because when it was written that name did no exist. It has the 21x9" rims and the 265 mm wide rear tires:
Yes, this is Elon Musk's car which has some experimental iteration of what's now Perf+. It was loaned out to Edmund's and others for reviews last Fall. We've dissected this before.