Thanks George, petr, and Kai for your comments. This is one of my top favorites of Bach concertos and I really enjoyed playing it.
Kai, I've compared various renditions of this movement by different players including Gustav Leonhardt, Trevor Pinnock, and Glen Gould. Most of the players are doing the turn of the third measure in more Baroque way except Glenn Gould who is doing 'Quintuplet Turn
' which sounded more foreign to me. Well, however, that's my feeling and Gould is Gould.
Life is short and there are so many music to be played.