If a week is a long time in politics, three weeks feels like an age in football.
And yet as the Canary tribe prepares to gather again at Carrow Road this weekend for what could be a wholly crucial home clash with Bristol City, the reign of Bad King Glenn appears something of a life-time ago.
The reign of Good King Bryan simply goes from strength to strength; three points against the Robins and on the back of a five-game unbeaten sequence, the smart money would be on City steering clear of the drop this season.
Particularly if next week's opening of the 'emergency loan' window brings in another new face or two. And Andrew Davies, for example, now that Stephen Kelly's snow-hit move to Stoke has finally gone through.
What is fascinating to observe is quite how the new City boss has managed to turn the whole tenor of the club around in such a short space of time.
Because, for me, it goes back to what we said a while back. That these days there ain't nothing too big or too clever about getting 16-odd lads to play for you. They've simply got to like you.
'He's decent…' is the greatest dressing room accolade a professional football manager can really ever aspire to these days; if you've got that on your cv then it makes up for all manner of sins on the official 'qualification' front.
You can have as many badges to your name as you like, but that's the big one. They like you.
So on that score, 'The Gunner' was always onto a winner. There was always going to be a 'bounce' on his arrival on the touchline. On his big day, in front of his Norfolk public, the boys weren't going to let him down.
And Barnsley (h) was Gunn's big day; his moment in the Carrow Road sun. And, true to form, the boys didn't let him down. Together, everyone had a ball.
But some three weeks on and for my money, there's some bigger things at work. Some things that deserve equal applause; some things that suggest Gunn might be more tailor-made for this role than one or two suspected.
Because, I have to say, one of his biggest strengths thus far is his ability to recognise his own weaknesses. And that's no mean feat.
He hasn't set himself out to be the master of all the managerial trades – and end up being the jack of just one.
What's he's done is followed his instincts and made sure he's the master of at least one – and then encourage and empower others be the master of their's.
Ian Crook's arrival is the biggest case in point. For if you are big enough to recognise that, you know what, I'm not as good a technical coach as my old pal Chippy, so I'll let him get on with it… then, fair play.
You let him coach – now aided and abetted, of course, by Ian Butterworth – and you do what you do best.. man manage.
Likewise with the mentor figure of John Deehan; that as Gunn starts to get his feet under the management table, there will be situations where he will look to others for advice… that 20-odd senior players into 16 places on the team-sheet and bench won't go, so what do I say to a luckless Simon Lappin or an ever-willing Matty Pattison?
At which point he will, you suspect, turn to a Deehan for advice; that's what he brought him in to do from the start – to be a sounding board; a mentor; a wiser, older head. That when he put together his 'dream team' on that long, family walk across Holkham Beach, he recognised where he was weak and bolted on strength.
And that's smart. That's big and clever.
As many of you will know, my other 'half' these days is as a fully paid-up member of the new media luvvie ponce club; working with Channel 4 and all that to bring you 'backchat'.
But there's a guy in the States called Jeff Jarvis; he's a professor at the City University of New York. And that's his big mantra – 'Do what you do best, and what you don't do best, link to the rest…”
The point being that rather than, say, newspapers pretending to be a TV station, link to people who are… and then do what you do best, ie write.
And if you're lucky-stroke-smart, the same thinking will apply in reverse – that the TV station will do what they do best, ie make TV, and link to the rest that write. Because that's something that they have never done best, write.
And it's this same kind of thinking that Gunn is now bringing to the Carrow Road party; that he's doing what he does best – ie man-managing and 'networking' into his ex-Pittodrie crew – and then empowering the rest (Crook, Butterworth and Deehan) to do what they do best… be it coach, offer advice, scout or whatever.
And it's smart, joined-up thinking.
The kind of smart, joined-up thinking that deserves its due reward come five o'clock this Saturday.