I don't think that those cars all were running the same level drivers and all were on a hot lap.
But even theoretically - Plaid is comparable to GT2RS in power to weight ratio ~0.44hp/kg.
Senna - 0.58, Hennesy Venom - 1.17, F1 - 1.44.
Senna and GT2RS are both RWD, so they can't really exit that fast from the corner.
But if you turn - suspension and weight matter a lot.
MR package for GT2RS changes only aero and suspension and cuts 20 seconds at Nurburgring.
And those cars are built for the track.
As you know, Randy made 1:27.62 on street-legal Senna and 2.3 seconds slower on preproduction Plaid.
Is it going to be enough to add aero, suspension, and street-legal tires to beat those 2.3 seconds is yet to be seen.