I think Gibson is getting a lot of flak for not playing regularly at club level, similar to O'Shea a few years ago. Fact is, very few youngsters get a run in the United first team. Even the "never win anything with kids" team only played one or two of the kids after the opening game thumping by West Ham. O'Shea had to wait and get his game when he could until the likes of Neville were no longer good enough for regular first team action. Gibson has the same problem with Scholes right now, and it could be next season before he starts to get regular starts.
Personally, if the likes of McCarthy or Wilson were starting for the international side, it would take the pressure off Gibson, as he wouldn't be expected to replace and improve on either of them.