First 2 points : fair enough.
thrid point : Who? Find me some quotes were people said he was Cannavaro, or similar. Seems like its more people making up the claim that people said he was like the best defender ever when he played those 3 and a half games.
Its more like people saw an inexperienced young defender come in for his debut and not look out of place in the team in a position which is one of the hardest to look good in at that young age. And you don't do that if you're crap, you do that if you're a decent young defender with a lot of potential.