Manufacturers of cars of this nature will actually ask tyre companies to submit tyres for testing, and they will then pick the best ones, often some tyres come about for a specific car.
It is obviously the tyres, you get what you pay for, I've used pretty much all, the biggest shocker was Hancook V12 Ventus EVO, got these on the front of the sapph, getting a set for the rear, jesus are they good.
But as said do give them a chance, some can take 500-700 miles to get to their best.
Of course no harm checking/adjusting tracking.
tabetha