London 2012 must get the ideas and the details right
After the hiccups at the opening ceremony involving the cauldron, she told me that London organisers have to make sure they carry out plenty of rehearsals before the big night - not just of the ceremony but also of the transport plans.
She also says London needs to keep things "simple" and, as she put it, "keep things British."
I think, she has hit the nail on the head as far as the Vancouver Games are concerned.
The Canadians have come up with some brilliant ideas, like the cauldron with the five flames representing the whole of Canada coming together for the Games.
The problem is that organisers don't seem to have thought through the detail.
Failing to build a high platform for the cauldron down at Vancouver's waterfront has meant police have been forced to put up fences around it to stop vandalism and that spectators can't get near it.
So after touching the emotion of Canadians all around the country with the longest torch relay ever, the locals have been kept away from the most powerful symbol of the Games.
Sometimes it's better to keep to the basics - a high cauldron which can be seen from everywhere and can't be vandalised easily.
The high ticket prices in Vancouver are also a sobering lesson for London.
Jowell says 2012 may have to have a few really expensive tickets for high profile events so that prices can be kept down for the rest of the Games.
But Vancouver has also taught London a lot, especially about taking the Olympic atmosphere to the streets with big TV screens and Olympic festivals in the city centre.
The main thing I will remember from the first week of these Games is the enthusiasm of Canadians for the Olympics - young and old alike.
Yes, I've seen demonstrations too, as I have reported in this blog. But I've also witnessed a real passion for the Games.
If the Brits can match that in 2012 and fill the arenas like Vancouver, we're in for a great Summer Games.