You don't always have to drive flat out to do well in a race. After all, there's a limit to how fast you can go. After you reach a certain limit you're probably going to start ruining tyres and brakes and not looking after the car as much as you could in favour of an extra few tenths a lap. Michael has the ability to go incredibly quick when he really needs to do it, such as in Montreal. If he's up at the front, he doesn't need to drive totally flat out, he just needs to drive as quick as possible
within the limits of the car.
On the subject of Ross Brawn : Modern F1 is now vastly different to that of 15 years ago when we had Mansell, Piquet, Prost, Senna etc on the scene. Due to the fact that overtaking is hard, races are won and lost in the pits, as you all know. In some ways the role of the tactician in modern F1 is kind of like that of the spotter in NASCAR. Brawn sits on the pit wall, armed with lots of data (and a banana) and calculates where Michael needs to be and when. It's up to Michael to put the plan into action. There's no way Michael would be able to do it all on his own, because at the end of the day it's Ross who decides how much fuel goes into the car, and this determines where the car will come out on the track relatives to its rivals, and also when the next stop will be. It's Ross who decides this, and Michael who executes it. Obviously Michael likes to be aware of what he's doing (he's often on the radio asking about other people in the race and how/where they are), but to give just Ross credit for it would be horribly incorrect. Like many others have said above me, Michael is the one who has to carry out this plan and drive the car at the most appropriate speed at the most appropriate time. Once again, Hungary '98 was a masterpiece of creative driving and strategy. Ross couldn't have done that with Rubens, and Michael couldn't have done it without Ross.
I think some people on this forum suffer a very blinkered view of M Schumacher. I'm by no means a big fan of his, but I can totally respect what's done in terms of results and how he has achieved most of them. Forget Adelaide '94 and Jerez '97, Michael doesn't need to do that anymore. On the track, he's the quickest and most clued-in guy out there in the most well-built car, with the best strategist working for him. He certainly gets my respect for building that team around him, and then using this team to its maximum potential.