No, his record in recent years is awful. His last 6 jobs in football have been failures, As manager with Australia, Cyrstal Palace and Leeds, on the board at Pompey, coached Boro to 7 wins from 25 games and as assistant manager with England.
He's obviously a chancer but his mangerial record is actually average and has been talked up by his drinking buddies in the media (he owned the club, 'Scribes', that they all drank in back in the day). Plus his best days are long behind him.
He took a team that O'Leary, for all his faults, had in the top 5 to relegation trouble, that should tell you all you need to know.
I'd have 'No, he's a crap manager' as the choice in the poll rather then it be the fact he's a chancer!