Haha yeah it has often seemed like it.
Thankfully McCarthy was sensible enough to realise the talent of Duff though (he was routinely terrorising right-backs in the Premier League), and he did very well at that 2002 World Cup sandwiched in-between 2 excellent seasons for Blackburn (I remember them fondly) in the Premier League.
Duff was an incredibly good player. Second best player of that Irish era (and it was a good one) for me behind Roy Keane but ahead of Robbie Keane. I remember some United fans talking about him as a Giggs replacement, who was going through a rough patch, and Duff at his best wouldn't have looked out of place at all.