I disagree. If you read his interviews he talks about how he started off in the lowest non-league division and has gradually worked his way up through the leagues. Last season he played just one or two games for us in the cups, and this season he's played in Europe and the Premier League and got into double figures appearance-wise. This season definitely represents massive progress for him and I think he's the sort who'll use the return of Krul as the chance to fine-tune his game in training even more in order to fight for the number one spot.
He seems quite down to earth and pretty humble, so I can't see him getting ideas above his station.