Its really hard to explain, but I have said on multiple occasions that:
The Jaguars have a number 1
Packers don't have a number 1
The Eagles (with Jackson) do not have a number 1
The Dolphins (admittedly not a great one) have a number 1
IMO, being a number 1 is not singular about production. Welker could have more receptions and yards and TDs than Moss in NE but I would say that Moss is number 1.
Also, it doesn't mean you cannot be productive without a number 1...the Packers and Eagles had two of the better offenses...the Jaguars and Dolphins had two of the poorer offenses.
To me, being a number 1 entails body size, athletic ability, production, and speed. A person you can plug into any offense and should produce and should have some measure of success against any type of defense.
Yeah you've said it multiple times and you are wrong. Jordy is clearly a number one and Cobb was about to have a break out season before his injury both of them would be number ones on a lot of teams