As others have pointed out, you can't make an objective comparison. I expect that the quality of drivers will be similar across the board, with the WTCC having slightly better quality drivers near the top-end of the game.
The motorsport talent pool in Australia is very small compared to Europe. You have to keep that in mind. Interesting observation is that those drivers who have succeeded in international racing have been good performers in the V8SC:
Larry Perkins (Euro F3 champ, F1 GP driver)
Russell Ingall (Brit F Ford champ)
James Courtney (Brit F Ford champ, All-Jap F3 champ, F1 test driver)
None of the teams have quacked, so I don't think anything fishy is going on. It seems they are simply ahead of the development curve compared to their rivals.
Here's one from the 2010 Targa Tasmania. This one is an onboard from the rally's outright winners, Jason and John White, driving a Lamborghini Gallardo Supertrofeo Strada. Sexy.
Hilarious video from a Mitsubishi Lancer Evo in the rookie modern class. Driven by Adam Newton, navigation by Daniel Lemish. Sounds like they had a lot of fun!
Now, for a bit of raw sound and cool camera angles. David Watson and Stuart Lester in a Volkswagen Golf R32 in the showroom class (ie. production cars, no modifications other than for safety).
Kubica is definitely impressive compared to his team-mate, but there's the crux of the issue regarding Kubica - just how good is Petrov? Is Kubica over-performing, or is Petrov under-performing? And by how much?
The driver who has impressed me the most is Nico Rosberg. Even considering that Michael Schumacher is rusty and behind the power curve, Rosberg is completely thrashing him and sitting 2nd in the WDC ladder, ahead of better seeded drivers.
Well, the offence has to be identical, I think. Otherwise it makes no sense.
In Sepang, Hamilton was penalised for weaving on track. In Shanghai, it was for driving too close to the crew area (Vettel copped a reprimand too, for forcing him there).
It's not about absolute dollar amounts, but the marketing value per dollar. For a successful team, F1 has more marketing value per dollar than Le Mans. Unfortunately for Toyota, they weren't successful in F1.
It wasn't a penalty. He was reprimanded. In other words: "I'm going to let you go this time, but don't do it again, or you will get a real bollocking."