AUM:
HvS is 16 seconds faster than Walter/Porsche in the GTR. Porsche claimed that the GTR could not lap the Ring faster than 7.54 without modifications or cheating. They were wrong and should apologize.
It is entirely possible that Suzuki, who is probably the fastest GTR driver at the Ring, is 12 seconds faster than HvS. Suzuki has factory support that probably optimized the suspension settings for a time attack, while still leaving the car stock.
Remember the first Suzuki time was 7.38, exactly the same as Sport Auto. It took Suzuki 18 months and thousands of laps to achieve the faster times.
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I somehow understand Porsche's position... They play it fair as far as lap times of recent models is concerned (GT2, 997s, GT3 Mk2). If a competitor tries to influence potential buyers with misleading or wrong lap times they need to react
Let's assume for a moment that your theory about Suzuki was correct: then it would also be safe to assume that GT2 and GT3 can be driven around the ring much faster than SportAuto demonstrated.
Therefore, we need to compare comparable numbers. If - following the above logic - the GT2 was capable of 7.21 (i.e. 7.33 minus 12s), the GT3 was capable of 7.38 (7.40 minus 12s) and the GTR was capable of 7.27 (latest Nissan claim) the picture would still be fine. Same applies if we just look at the SportAuto numbers: GT2 is fastest, GTR approx. on GT3 level. 997TT slower.
What does not work is to compare the Nissan press numbers with SportAuto numbers. This will mislead potential buyers - and has mislead many people (including yourself - based on some of your older posts) on the Internet