i agree. it's a little sad, though. he did say that people think that he's playing himself on community. i haven't seen him in sons of anarchy and deliver us from evil, but i have seen him in ted and what's your number and the informant! before watching community, and i remember saying 'oh, it's him again.' and his characters are just different versions of jeff.
so he's become this go-to guy for jeff-types...you kind of root for joel mchale to bag a role that isn't as 'done-it'. i thought he nailed it when he impersonated dean pelton. i also think the 'chris pratt' joke in season six was a jab at that, because joel mchale could also very well play starlord as he's an egotistical rebel leader who will have your back when the going gets tough...like jeff winger.
but yeah...jeff winger DOES occasionally wear genuine designer duds on set. i kind of find out as i was looking at abed's endless threadless shirt count on worntv and kind of crossed over to jeff and was like 'wuuuuuuuut?'