Think he showed great mentality, given how he was unexpectedly thrown in like that. Of course, keepers on the bench always have to be prepared to come on in an emergency, but it's not often you're pulled into the fray in such circumstances. He coped very well.
Nothing against Migs, but Adrian is an unknown quantity for many of us, so we could approach his introduction with neutral eyes. If it had been Simon coming on I think any number of arses might have started twitching, 4-0 up or no.