The man above has no idea about forced induction used in racing.
The last few cars to win Le Mans were what? All forced induction.
The Porsche 959? Forced induction.
Ferrari F40? BMW F1 motors in the 80's? Group B rally cars? Current rally cars? SLR Mercedes? No need to keep piling on.
The car that jump started the sport sedan idea before the M3 was even a gleam in someones eye was the 2002 turbo.
Someone must have forgotten that the BMW M3 is built for the road, not the track. BMW does not have homologation goals to reach with this car, that stopped back with the E30. BMW must have gotten confused putting I-drive in, heated seats, EDC, etc, in the E92.
The cars primary function is to be a street car. The fact that it can lap well on a track is a bonus. No matter what is done to it, it will never be a go-kart on the track and as it is built now it is not the best choice for a dedicated track car. It will be compromised in that role.
The history of Lamborghini was producing tractors, who cares? Goals change, companies and models evolve. If BMW really cared about the track instead of selling cars for the street, we would see a CSL, wouldn't we?
99% of the these cars will spend their lives on the street. The guys who do track, should be able to admit their cars spend more time on the street and that they are a minority anyway.
I guess convertible hardtops and automatic shifting is BMW building their car for the track, eh?
Nitrous is a great addition for those who want a short burst of power. It is even better as a stop gap measure until turbo or SC forced induction arrives. Not to mention the cost per HP can't be beat.
Saying certain cars take to NOS (it is nitrous, get it straight) like Stang's, GTO's, or basically American muscle is stereotyping. Motors like the M3 lend themselves well as the torque increase on the juice makes the M3 deadly with its high redline, not to mention the strong internals. There is a long history of E46 M3's with nitrous, some people are just behind the times and way behind in the tuning scene.
This FAQ will answer a lot of questions for people about nitrous on M3's:
http://www.m3forum.net/m3forum/showthread.php?t=208229