The rate at which Sehwag scores his runs renders "flat-pitch" criticisms irrelevant, in any case. He makes up for the flatness of the pitch by giving his bowlers more time to take 20 wickets. Basically, he converts flat draw pitches into result pitches.
Ok let me say at the very onset that I do not believe that Sehwag is a flat track bully.
Having said that, I still think its a poor argument if you are arguing against the notion that Sehwag is a flat track bully. The rate at which he scores, and how much time he allows for his bowlers to take 20 wickets is absolutely irrelevant to whether he is a flat track bully or not.
If anything, your argument goes counter against Sir Alex's argument that the pitches are not flat because they produced results. Sehwag makes results possible because of the rate at which he scores. That doesn't change the nature of the pitch does it
So use a different argument buddy
Now back on the topic, I do not believe Sehwag is a FTB but thats because I probably have a different definition of FTB. Thilan Samaraweera is a FTB. Not Sehwag or Hayden.
But I still do not believe Sehwag is the best batsman in the world. The reason is his lack of footwork makes it very difficult for him to face the moving ball. When the ball moves, I have seen Masrafe Mortaza make him look like a fool.
Now is he the only batsman in the world who struggles against the moving ball? Hell no!
We saw how three top Australian batsmen, Ponting, Clarke and Hussey, all averaging over 50 looked helpless when Asif and Aamer were swinging the ball.
Over 90 % of the batsmen today would struggle against the moving ball. Sehwag is not an exception.
So the best batsman today is Tendulkar and Tendulkar alone with Lara gone. Maybe Ricky Ponting too a couple of years back, but not anymore.