"After Leno joke, it's Biden's Turn Turn ToMock Indian Accent"--The times of  India,kolkata, Saturday, January 28, 2012; front page & p 19".
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RESPONSE :
Nothing new nor unexpected. Of course , it seems  that  - Biden never read  'Arms and the Man' of  George  Bernard Shaw, where Nepoleon , in the play, asked  his  general about America:-
: 'What language these  Americans speak '?

And the general's reply was -
: 'Sir, they  call  it  English !'
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  So that is how  the modern  U.S.A speak their language too, by  Oxford -standard, I think , as G.B.S. recorded.
  Some Indian N.R.I  mayplease, bring this  message to his notice.