Plenty of people have to come in in ODIs and start swinging straight away, and most average better than 8.
All he has done is tonk a few spinners for six, and now people think he is the next Sobers.
As I was telling a friend the other day, Johnson is just as likely to get out for Zero as he is to score 50, he is NOT an allrounder, and never will be, batting is not just belting sixes, batting also includes protecting your wicket and not getting out.
Edit...Johnson is more likely to get out for Zero than make 50.