English football has been flooded with generally mediocre wingers for some time now, Dyer was probably the first one. They are all along the same lines; fast, black, direct and brainless.
Zaha is the new hype, he seems to have a bit more brains and tricks about him. But then Fergie did also try to sign Walcott, SWP, Pennant and probably others at one time or another.