Call it knee jerk if you want, but I say let's go and buy this Mexican goalie from French minnows Ajaccio before someone else snaps him.
I remember Arsene Wenger saying on French TV TF1 once while he was commenting a world cup game that it's very unwise to buy a player based on his performance over a big tournament only. Some players are so pumped up for the occasion that they perform well above their usual level but it lasts only over a short period.