According to you AMS is right and Sport Auto is wrong...
You are die hard 997 Turbo fan? Well, I am sportscars enthusiast, not single brand fan.
How about recent comparison test in lates British EVO mag:
997 Turbo(manual)
0-60mph: 4.0s
0-100mph: 8.7s
0-160mph:27.5s

Lamborghini Gallardo
0-60mph: 4.3s
0-100mph:9.4s
0-160mph:24.2s

Gallardo is faster then Turbo from 0-120/130/140/150/160mph!
But, you will probably claim that EVO is very biased British magazine...

Imagine situation when Gallardo driver is driving 280km/h on the autobahn... When will 997 Turbo driver be able to overtake Her/Him? Never...