No, there wasn't concern, there was an atmosphere of "This c*nt better be fucking flawless or else". A large segment of the fans were desperate for an opportunity to moan about Guardiola getting rid of Hart, they couldn't wait, and whether his mistake had come in the united game, or 2 months down the line, some members of this forum were salivating at the idea of him cocking up, backed up by the same "this foreign passing out from the back lark aint for me, what's wrong with defenders who just lump it into row z" attitude that already existed.
The old Bravo thread has been taken down but you could see it in the comments before his debut, he was already on the chopping block before the United game, and afterwards you'd think we'd lost the game because of him, not put in one of the most dominant displays in years at the swamp - a game which would have been 4 or 5 if not for some laughably bad finishing from the front 4.