In response to zbellino's comment:
How can you not consider his point production, which is the weightiest evidence you've posted supporting the claim that he is elite, a product (not of Tom Brady) but of the offense as a whole (Brady, Welker, Moss, Gronk, Ridley, Hernandez, Faulk, Edelman, and a whole cast) over the 8 seasons? They've likely scored more TDs in those 8 seasons than any other offense in an 8 season stretch. If he hadn't scored that much he would straight up stink.
He's been iffy the past few seasons, as Doug says above, but bounced back with an exceptional season last year. I don't consider any kicker 'elite' if the coach opts to go for it on 4th and long as often as Bill has as opposed to kicking 45+ yard FGs.
If he strings together a few more seasons like last season, I'd take the conversation up again.
He's ranked 6th all time in kicking percentage playing half his games in a stadium not meant for kicking both in terms of the wind and as the days get longer the cold. Even with the high powered offense giving him tons of points that also means he has a lot more chances to miss kicks too yet he's still in the top 6 all time.
As for BB trusting at 45+ on average Vinatieri kicked as many 40-49 and 50+ on a yearly average as Ghost does and he actually missed more often. If you considered Vinatieri elite like the rest of us then you have to consider the same for Ghost.
If you were wondering about the playoffs he's over 90% success rate so he still gets it done in the post season too.