Back to the above discussion:
I dont know if this is a matter of being technically correct or not. In the 1998 Ind Aus series, I remember Ian Chappel saying how RD and Greg Blewett treat an incoming delivery from a fast bowler (probably on middle and leg) differently. RD will usually attempt to play it wide of mid on (squarer) while Blewett was likely to play it straighter, to the left of mid on. IMO, a technically correct batsman would have done what Blewett did, considering the deliveries that Chappel based for this observation.
Over a period of time in intl cricket, this has become a slight irritant for RD too. Too many times, he has got bowled playing too square to incoming deliveries and getting bowled.
I have seen SRT having similar technical issues after a length of time.
To their credit, both batsman have been good enough to address such problems. But it always surprises me that such faults which creep in arent corrected within a series itself. This is where coaches and even the batsmen themselves have to be sharp.