First of all 7:04 lap time is just a rumor,there is no reliable source about that event.And secondly,Mclaren didn't agree to that time.S ince most of the things you say are made up and mostly wrong like 991 Turbo S being faster than 991 GT3 around track,GT3 cars doing 6:30 at full ring when the time is for 0.4miles shorter track.So I would like you to show the proof or admission by McLaren about that lap time.
Only official statement from McLaren is the 110mph average and that's it.I am not saying it beat 918 or so and I already admitted about 6;54 being wrong.So what more do you want?
Mclaren is not as crazy as setting ring lap record as much as Porsche is,it is clear from the statement made by Lazante.So according to your logic McLaren should be scared of P1 LM losing to 918,Laferrari.
And the 6:37 was not the lap time McLaren claimed P1 would do,it was just to inspire the workers about the P1 and that too is wrong as.6:33 lap was used for promotion purpose.
And lastly I do agree that P1 needs optional tires to beat 918 and then if you can't believe the statement by McLaren,there is no need for me to believe Porsches statement.And FYI McLaren always only said the average speed of their car around a track.Take for example F1's mira circuit and millbrook record.And that too was done to give the retiring owner of a track a memorable moment.