Hi Marco
I've had a similar experience with workshops, seminars, classes etc to yours
The level at which even an "Advanced Photography" class operates at the University level here is appalling
I know you don't care to visit the US, but I will post this link to "Washington Photo Safari":
Washington Photo Safari
I have high hopes for this excursion. I'm joining in April during Cherry Blossom season.
After corresponding with the leader I am sure it will surpass the usual level of "I've risen to the level of my own incompetence and have nothing to teach you" that I've previously encountered
BTW, there's no better place to learn about good photography than the Photo Forums here
There's some fantastic work posted there every day
Thanks
Allan