Predictions are difficult. All the previous evidence can lead in one direction but then be entirely wrong. So, predicting stat leaders in 2013 may be an exercise in futility, but it's still an interesting one.
There are many ways to look at this. First of all, it is crucial to see who did well last year. It's far from a given that statistical leaders from 2012 will repeat in 2013, but it is certainly a possibility. Few players who weren't near the top last year will be No. 1 this year.
Most important, though, is ability and situation. Calvin Johnson is clearly a phenomenal talent, so he should be a consideration for every receiving statistic. Megatron's ability is more important than the fact that he led in many stats a year ago.
It's easy to analyze hindsight, but looking to the future proves much more troublesome. Which players will prove to be the best of the best in 2013?