Based on what? Your opinion? I seem to recall Rohrl's time in the 918 was only 7:14 until they hired a pro-GT racing champion and came back with a different car and magically cut 17 seconds.
no based on my time at the factory, and about 500 miles in 5 x 918s, at 3 different race tracks, have you felt the weight of the 2 roof sections, ?
The car that R tested was a very early pre-production model....