It's more a case of understeer leading to snap oversteer. Not just Porsches but VWs, the Corvair, Tatras, Renaults, Skodas, etc. Rear-engined cars are notoriously prone to oversteer, with the weight of the engine in the back of the car trying to get around to the front of the car, especially if you're trying to brake and turn at the same time. Porsche has spent decades dialing in understeer as a means of combating that. With the original 911, it wasn't too bad, but when the 930 Turbo came out, it became a critical problem. All that horsepower could overwhelm the suspension, and it suffered from a lot of single car accidents with the car on the outside of the corner facing back towards the road because of that snap oversteer. The car is pushing, pushing, pushing and then suddenly the back of the car comes around and it's too late. Of course with each generation of new 911, they have done an amazing job of fine tuning the suspension to make it behave much more civilly in corners, especially the 4WD models. But all 911s are a bit like a domesticated dog. Friendly and docile, but every once in a while they show a hint of the dangerous wolf they're descended from.