We have seen that how some class players have struggled to score at a demanding rate. While many face it difficult to score at a test rate (2/3 rpo); like Shehwaq/Jayasurya etc. All the players are human beings and we can't expect a person to be comforable at both extremes. There may be some very rare exceptions.
Adjustment is Possible within a sensible deviation limits to one's natural instincts.
Bangladesh Surely will be in QF of the WC15