Effective Labour Shadow Cabinet?

I think its becoming pretty clear that Ed Miliband and his shadow cabinet are not performing well and not making an impact as an effective opposition (click image to enlarge). Why for instance did they not strongly make the point that the recent much bigger than expected economic growth figures are a result of Labour's policies and action whilst Alistair Darling was Chancellor? I'm not an economist but I know a bit about politics, decision making and complex systems, which includes economies. Its crystal clear that this coalition government cant possibly be responsible for the last set of growth figures because they've simply not been in power anything like long enough to have any effect.

There is a time lag between government economic policy/action and effects appearing so we'll only begin to see the impacts of the coalition government on growth as more months and years go by. We are however seeing the effects of the previous Labour government now. Labour's weak shadow treasury team failed to strongly point this out, made only lame comments and tended to talk down the economy. Ed Miliband and the shadow cabinet failed to go with what is both the truth and the best political strategy/tactic and take the credit for the growth figures - so maybe former Labour cabinet member Jack Straw was right when he said that a third of the new shadow cabinet is incapable - maybe its more than a third!