There may be something in this with regard to standard cars, but I don't think that it can be applied to modded cars. OK, chavved up Corsa's may be an exception, but I am talking about serious modders.
My reasoning for this is that people of a similar disposition tend to gravitate towards each other and become friends.
Most of my close friends are petrolheads but drive disparate modded cars.
Winston has a Rover 3 litre (with a Cleveland 351) as his road car and a Mk5 Cortina drag car (again, with a 351)
Dave had a Cosworth powered Dutton drag car for many years but is now building an 800bhp Ford Fiesta road legal drag car.
John drives a Jag (at the moment) but runs a 1954 Ford Prefect (351 power) road legal car on the strip.
Andy is rebulding his BMW from the ground up.
Darren owns a Frogeye Sprite (highly modified), Elise, Ultima, E Type and a few others.