Oh come on!
Its not like Ibra has just found is scoring boots, the men has scored goals everywhere - Inter, Juventus, Milan and Barcelona.
That said there is no risk free transfer in the world of football - even Kaka floped at Madrid and Shevchenko was arguably the best striker in the world when he moved to Chelsea at his prime and still floped.
So yes Ibra can fail in England, there is always that chance, but being a free transfer on one year contract and with is curriculum I find it very hard to find some other transfer that can give you guys more assurance.