I definitively think it is affected by the QB. And even on a given team, maybe a QA throws away to one guy more than others....not really sure I agree but I agree its possible. Your example of Gronk is interested but he did not just get a lions share of throwaways, he also got lots of targets. I don't think there is a public database that tracks what is being discussed, I could be wrong but I don't know of one. But stats in general all "depends on the team". What would Marvin Harrison have done if he were drafted by the Bills and played with the rotating QB's?
This does not work.....diggs drops the ball and fumbles. Drop rate I would agree with, Davis does not have a history of costly fumbles. But a "Number 2" implies he has some warts that prevents him from being a "Number 1". What people want is 2 number ones....that is not a bad thing but lets just be honest that is what is really desired. I would like to see Kincaid get opportunities down the field.