I have said before that 99% of people are judging MCarthys talent and deciding how much he's worth based on watching Wigan all of 3 times when they were on TV, more often than not against Man U, Arsenal etc and a few youtube videos. The same way people decided that Ofoe, Fer, Marrone etc were "brilliant" talents and wanted them at all costs despite never seeing them. We are not Wigan fans, none of us watch them on a regular basis so how we all profess to know just how good McCarthy is, is beyond me. Like you have pointed out and I did in a previous post, this is exactly what the Man U fans are doing and we are having a go at them.
If he comes and he is **** then Martinez has made a mistake and we can question his judgement, however he may come and be a excellent 1st team player that develops into a top PL player. We need to trust Martinez until he proves otherwise.