This is more or less on the money, it seems the entire automotive market is making a shift towards smaller FWD vehicles, even into the sports car theatre.
Racing, especially in production based categories always reflects the general state of the domestic market with trends etc.
I know in BTC and WTC that RWD cars are penalised with weight over the FWD models and of course AWD has the harshest penalties of all.
It comes down to the fact that there are far less RWD cars that are small and lightweight enough to compete with some of the FWD vehicles being run.
Most FWD vehicles are small and very lightweight, which is more of a differentiator then the performance deficit fundamental in FWD layouts.
Generally when I make an argument about the various pros and cons of a drivetrain layout, I use a like for like comparison. weight, COG etc etc.
anyway this is more about rally and does not IMHO accurately reflect the consensus of motorsport(S) in general.