I don't think this list means anything. Breaston isn't the 7th best WR in the NFL, nor is Brandon Marshall the 31st.
That's true about Breaston and Marshall, but I think it's far from meaningless. Like everything else, it just has to be interpreted correctly.
Everything with football stats is in the context of the team, so what it's really saying is that the Cardinal passing game has to be really efficient, in order for it to have three guys rated highly. It's also interesting to see they've got it sorted by DYAR, a counting stat. By DVOA, the rate stat, Fitz drops to 9th, Breason's 11th, and Boldin's 2nd behind a guy who has has the minimum of 18 passes thrown to him.
In reality, Boldin is the one who comes out of this evaluation looking terrific... he's miles ahead of the guy at #3. Pretty impressive.