Someone posted this on another forum. It's an interesting read that somewhat concerns your question.
Gary Anderson's latest testing (from Barcelona) impressions in Motorsport-Aktuell:
Ferrari:
Barcelona is still very abrasive for the tyres despite its new chicane, and Ferrari is still the best when it comes to tyre degradation. It wasn't a surprise to me since Ferrari is working with BS for several years now. Ferrari's advantage on the long runs is obvious which leads to the following conclusions: either Ferrari sandbagged and mislead the competition, or Barcelona magnifies the tyre issue. I watched this car for hours in turn 3, 7 and the new chicane and it was clearly the best car there, it stays very stable, turns in very quick and isn't any nervous at all despite the drivers fighting with the harder compound. It caught my eyes that Massa knows how to handle tyres better than Kimi does, he sure learned a lot from Michael. It looks like Kimi still has to catch up there. So i think that Kimi and Massa will be equal on a fast lap, but Massa will be faster on a long run.
Renault:
Their car impressed as well, but its not as stable as the Ferrari. The rear is more nervous than the Ferraris but there is no other car that generates as much downforce as the Renault. Laptimes are very consistent. Kovalainen and Fisichella should be happy.
McLaren:
I was surprised how Alonso handles the McLaren. It seems he tries to enforce his Renault driving style on the cars front-axle and overdrives it there. This leads to a premature degradation of the front tyres, something i couldn't see on Hamilton's car. I think its time for Alonso to give up his Renault-thinking. Its like Räikkönen, fast on one lap, but worrying on the long run. Hamilton's style, in contrast, is very smooth which amazed me. I thought he was all over the track to keep up with Alonso. His car looks more 'calm' than Alonso's, and i think its the driving-style that makes the difference and not the setup.
BMW:
The BMW is still very impressive. It embodies a simple but effective chassis with a very good handling in all sorts of curves. It was interesting to watch the two very different drivers. Heidfeld, being very unspectacluar, is already very confident with the new tyres. On the other side Kubica who finally tries to get rid of his aggressive turn-in style. In fast corners the BMW is as good as the Renault, and in slow corners the car is impressive as well. Im worried about their new gearbox which seems to be fragile.
Williams:
The new Williams is almost as good as the BMW. But Nico had to fight a lot of teething problems. Wurz drove a lot more than Nico. The car scores good for turn-in response and 'road holding'(? = Straßenlage), and traction out of slow corners. When i look at the longruns i think their 1 year of BS-experience must be worth a lot.
Honda:
Very disappointing. I heard of problems but didn't think that the grip-deficit was that dramatic. I cannot see that there is anything fundamentally wrong with car and I'm sure the wind-tunnel results are better than the ones of the RA106, but the competition made a bigger step. In high speed-corners Button and Barrichello are not even close to their rivals. It lacks grip in the chicanes as well. If the aero updates, planed for the Bahrain test, don't work we can write them off.
Toyota:
While we are at the teams that should be at the front ... This will be their sixth season and we are talking about the biggest car manufacturer in the world with unlimited resources. The front-axle just doesn't like any corners. Awful. The front-suspension, in this setup, wont work in one million years. I'm sure Toyota will desperateley try to make the front tyres work better and ruin the rear-suspension while they are at it ... The car lacks downforce as well. They wont score their first win this year that way.
Red Bull:
Like Honda and Toyota, Red Bull has much work to do. While the car looks good in fast corners, it lacks grip in slow ones. Or did they miss to adept to the new tyres? The car looks very nervous and difficult to handle when braking and shift of direction. I heard that the drivers feel uncomfortable in the car as well.
