I would not be too sure on the value of Teflon to the players. No doubt he is a nice guy and gets on well with them but............
His games with player selection, persistence with failed playing options to the detriment of ability (ie Morris vs Head selection last year) and continuing games with playing people out of position ie Farah at half last year, playing Marshall at half this year, Harrison as a prop rather than back rower are noted by the players just as much as us, the fans.
BTW- I have heard that Farah was really pe'ed off at playing half last year, that he only did it for the team and that he asked for an assurance it would not happen again in 09- I dont know how true it is.