In USA students never face any problem in expressing themselves in English and that’s because the only language they use every where is english. . In India those who are from state borads learns it only after a certain class and therefore, few are never so comfortable with it.

 

But that does not mean students from state board don’t make it into IIMA.. .I know a general category guy who is from a remote village in orissa ( 2 teachers for 300 students for class 1-7 and there are only 4 class rooms)

 

 So there is a purpose of GD in selection process. . .and if you believe the B schools then GD is just not about communication skill but it goes beyond(leadership skill, listening qualities and so on. . .though I really doubt if you can judge so many qualities of 10-12 persons in 15-20 mins )