Hasselhof,
I am with you on this. Since when can a fuel injected IO-520 suffer from Carb Icing. I bet there was a fuel problem that was "attended" to. I won't speculate, as many do, and regardless of the problem I congratulate the pilot for accepting there was a problem and handling it in a professional manner. As they say it is far better to be on the ground wishing you were in the air than being in the air and wishing you were on the ground. If the only damage on the day was a bit of pride then it is a fantastic result.
Groggy