I'm the author of that article. Let me see if I can clear up a few things.
Jeremy Maclin has immense potential, but he's unproven and he's had a fumbling problem in the preseason. I wrote that. I also wrote that "If Maclin develops, the Eagles could have a truly terrifying pair of wideouts." That's correct. That was the extent of my salivation over Jeremy Maclin.
I did write that DeSean Jackson will be the best WR in the NFC East this year. I don't think that's terribly controversial. He had a very good rookie season and he plays with a good quarterback. [I rated Donovan McNabb as the best quarterback in the NFC East in the Battle of the NFC East: Quarterbacks.]
I wrote that Moss was good last year and that his presence is why the Redskins were rated #2 in wide receivers in a poor division for wide receivers. No one else on the team has proven anything, apart from Antwaan Randle El, who has proven that he's a decent slot receiver who should not be a starting flanker in the NFL. Again, I don't think that's terribly controversial.
Maclin is unproven like Devin Thomas and Malcolm Kelly. However, Maclin didn't piss away his rookie season [at least not yet] the way Thomas and Kelly did. That's the difference. If Maclin does piss away his rookie season, I'll write that when the time comes. I would note, however, that Maclin could at least show up to training camp in decent shape -- unlike Thomas or Kelly.