The rain is a level playing field, but that doesn't show a car's reletive performance. Brundle himself, said that the tack is x seconds slower and not yielding any grip.
I kind of know what you mean, but with the track conditions and lack of practise combined, I think we'll only know for sure (sorry I had to get that in) in Malaysia if it's dry. I mean look how many people spun off - Rosberg, Massa, Alonso, Vettel, Schumacher. That's got nothing to do with no EBD they'll be used to that from the thousands of miles of testing they've just done.
Brundle is wrong, a LOT and 95% of his basis for saying its the track is that last years cars and the previous few years cars all moving a certain way with ridiculous downforce at the back had EVERYONE on rails through corners, now everyone is sliding around both in corners and putting the power down.
People are getting used to driving cars that actually have significantly less speed and less downforce in corners again, I think the best drivers are showing what a MASSIVE difference driver skill is playing.
People are saying Rossberg couldn't put together a clean lap and was unlucky, but maybe its just much harder. Maybe the conditions are just suiting Schumi and he has a lot more confidence(and experience) with holding a car and adjusting through the corner.
I think Hamilton, Schumi and oddly Alonso were all actually doing incredibly well, with Alonso you have to take into account that the Ferrari is just utterly cash, yet he put in a not at all bad decent first lap before he went off, with a car that looks almost the least handleable car on the grid. The difference between the Ferrari and back of the grid crap, is engine/pace/driver Alonso was ridiculously close to going into walls and sliding off the track to put in such a lap but he man handled that car into a decent lap in worse conditions than anyone else on the grid.
Also people are getting into the "see Mclaren didn't make a mistake" with the nose fight a little to early. Suppose a car a couple years ago had f-duct but no blown diffuser, and the another car had the blown diffuser and no f-duct, the f-duct initially made a bigger difference, but people found it easier to stick an f-duct on the car with the diffuser and the f-duct car needed drastically more changes to sort out the diffuser, and after 3 races the entire field left them in their wake.
It's FAR to early to declare any car, or any specific design feature a "win". Mclaren might still be half a second faster with a different nose setup and double drs and find it much harder to introduce than other cars do, when other cars nick idea's off the Mclaren, they might be much easier to implement and they could find themselves struggling quickly.
Could also go the other way and everyone else(with the money) goes Mclaren stylie.