We did research it on line and found a few reports of failed turbos on low mileage cars with the same symptoms. But I would not say it’s a weak point, it would not put me off them. Important to have a good warranty though.
Most frustrating was getting UK OPC to diagnose correctly and replace them, as they kept saying that a bit of oil smoke on start up was normal. The OPC just replaced oil lines / pipes and said it was good to go on a 2,000 mile EU trip. So we did. Only got as far as Aachen where the turbo(s) blew. Which was lucky as we then chose to have the car fixed by Porsche Aachen.
The other cases we read about had similar experience, until the turbo(s) actually blew, OPC would not replace them despite signs of imminent demise. But I expect that is the rules / protocol they have to follow.