Valencia did well with Wigan. We knew what we've going to get and he achieved it to the full. Vidic was unknown material for many of us (since we signed him from the Russian league) but his reputation preceded him. Evra was a renowned full back who happened to overstay in France due to his personal friendship with the Monaco royalty.
You're not getting my point. All these players fulfilled their talent with us which, in itself, is amazing, considering how many players have failed to live up to the expectations set. However, while I do acknowledge that players may improve with us, I have yet to see a Park turning into the new Ronaldo or a Philip Neville turning into the new Paulo Maldini. That's my point.
I am not judging Gaitan at all. My point is pretty much a general point and therefore it doesn't have anything to do with Gaitan at all. What I do know is that CM needs some really quality in it. Giggs/Scholes wont last forever.