I would imagine Paul Simpson's quotes are fairly indicative of McGhee's standing in the game. He's hardly well thought-of amongst fans either. A fairly unremarkable piece of gratitude from Robbie Keane aside, I can't recall anyone having anything particularly positive to say about him...
I can't imagine why ... there certainly hasn't been a scrap of evidence in the latter case; he's flattered to deceive in almost every game he's played. As for CKR, he'll get you a handful of spectacular strikes a season, but a consistent goalscorer? I just don't see it.