I'm not say he's not, although I think in fairness, anyone could've replaced his predecessor and made an improvement because he was so unpopular and caused a Raymond Domenech style mutiny among the players. Lehmann just came in and started treating players as adults, which was hardly rocket...
He's made a difference, but he was in post when Australia played England last summer. Johnson and Warner have made a huge difference to the balance of the team and have very quickly become major match-winners for them.
I didn't really go along with the school of thought that last year's touring Ashes side was the worst Australian side to tour England. I remember the 1989 series and the Australian side that year was pretty mediocre, despite beating England 4-0. It helped that England self-destructed that year...
Australia are getting better, but they are also playing South Africa at a point when they are vulnerable. Jacques Kallis has glued their middle order together for nearly 20 years and has been a talismanic figure for them. This is their first series since he called it a day and I think they could...