Hi from France,
I totally agree with Powerslave. I am 23 and I discovered prog with ... Genesis (I bought all the CDs, beginning by the end

).
But in fact, where I was listening to Genesis a few years ago, I had never heard the word "prog". Thanks to the Internet, I began to discover other talented groups (and buy their CDs, which can be difficult in France where you can't even find those in the stores).
As far as I'm concerned, AM is better than other prog channels because of its diversity. So please, everybody, preserve it !