In what terms? Official 0-200km/h is 10.3s, if your question will press cars beat this figure? Answer is depending on the magazine. German AZ for sure will get better results. Sport Auto probably not...

Is 991 Turbo S capable to get below 30s for 0-300km/h? I do not think so. 560ps is despite known fact that Porsche "560ps" are probably the most powerfull "560ps" is still 560ps and you can not expect miracle here.

Look what cars can get below 25s in 0-300km/h... Ferrari F12 with 740ps, Murci and few others.

For below 30s in 0-300km/h you need more then 630ps and better gearing then the one Porsche is using on PDK in 991 Turbo/Turbo S. 318km/h is achieved in 6th gear at almost 6900rpm which means that you have only 300rpm till limiter. With current PDK gearing new Turbo S simply can not go faster then say it 323km/h.

All other sportscars equiped with DTC gearboxes are using 7th gear as power gear(458 Italia, F12 Berlinetta, SLS AMG GT). Only MP4-12C is using pretty long 7th gear as well.

Reasons are EU6 regulation that Porsche craves for and "fake" fuel consumption values. Just check out fuel consumption values offically presented by Porsche for 991 Turbo S...