Personally I think it’s different. Batsman form is more up and down than bowlers by the very nature of the different jobs they do. Any batsman can play a bad shot or get a bit of bad luck, therefore judging over a longer period of time negates luck and the odd bad shot to give a truer picture of ability. With bowling, you bowl a bad ball and the damage is limited and quickly forgotten so bowlers can be judged a bit quicker. Overton for example, has never looked a test bowler and again doesn’t in this test. It seems highly unlikely to me that he will improve enough (or even at all) if we picked him for the next 18 months.