He made fewer mistakes than his peers. Yes, there were some errors, but very few - so few I can remember them - other top GKs made more mistakes. But the press went on and on about any small mistake. Messi rated him as a phenomenally good GK. Messi's word is enough for me. His record against other top Prem GKs is a fair comparison during that 5/6 year period. His record for England when considered against Neuer and the like is a fair comparison. Neuer played 70-odd games behind one of the greatest teams who ever lived. Joe played behind a very average England team and yet has a better record than Neuer. Yes, Germany went deeper into tournaments, but otherwise they played the same standard of opponent.