I'd like to see him with our own eyes before we pass judgement and write him off with regards to his capacity to play for a club of our stature.
That said I thought when he first signed that it was a risk (and not very calculated at that) to spend so much on such a untested player, one who'd barely played at the top level of his own country let alone come here and be expected to adapt straight away. The further issue which irked me was that Fergie himself had not watched him and yes I understand he trusts Queiroz, but lets be honest Ronaldo apart.. none of our talents signed from Portugal have been absolute rip roaring successes, though of course the potential Nani and Anderson have shown was worth taking the punt on.
When you consider home grown talents that we missed out on such as Ramsey/Bale and were unwilling to put in bigger bids and yet we can go ahead and splash £7mill plus on a foreign talent who is similarly untested, an older player(albeit not that much) and not used to the british way of life or lifestyle of a United footballer...
You just can't bang on about value in the market and then be so risky with your money, anyway I wish the lad well and hopefully in 2-3 years, he'll adapt and be ready for first team football.