I agree. Something should be done because at the moment things are completely misrepresentative.
The 458 comparo still brings up the 1:01.6 for Anglesey National even though it was never even a correct time last year.
To keep things simple we could always just quote the best time but if we're going to try and stick with the lost cause of trying to select 'fairer' comparable data (if there's such a thing), then we at least need to do it right.
As regards the above:
The GT2 RS runs semi-slicks (MPSCs), therefore the semi-slick time of 1:19.6 should be quoted for the MP4 at Bedford.
Two ways of doing this. Either remove the 7:18 for the GT2 RS and quote the 7:24 achieved by Sport Auto, or quote the 1:27.5 achieved by the MP4 at Rockingham by the McLaren test driver. What you can't do is select Porsche's best times and compare them with McLaren's worst times across the board. It's already gained enough of an advanatge by the fact that Sport Auto has a huge hard-on for 911s.
The scores should be more or less level, with the MP4 leading by 0.3s on Bedford and 1.27s on Rockingham.