Australian Super teams were very strong back then & Australia U20's had exceptional talent coming through the systems.
Deans underachieved massively with the strongest generation of Australian players in a decade: Pocock, Genia, Cooper, Ioane, Giteau, Mitchell, Barnes, O'Connor, Ashley-Cooper, Beale, Horwill, Vickerman, Dennis, Sharpe, Douglas, Moore, Gill, Alexander, Polota-Nau, Elsom, 2x Fainga'a, Slipper, Robinson, Kepu, Cliffy Palu, etc..
He had quality & depth of personal coming out of his ears, and Australian Super teams were regularly dominating SA teams.
The Wallabies should've won a Lion's series, 2x tri-nations, and a grand slam - at the very least. Deans did poorly.