Outside of the top few elite WRs (Calvin Johnson, etc), I feel that most are interchangable. Most are just a products of their QB. On that list, all of those teams have high yardage QBs. All 6 of them have a QB that was in the top 8 in passing yards (other 2 were Luck and Stafford).
Give Christian Ponder the WRs from any of those teams and his stats won't go up drastically. But if you put one of those QBs on the Vikings, I bet their WRs would have a much better chance to get some love on that list.
"We're the 49ers, we can do whatever we want" - The Great Jim Harbaugh -