Hi lydian. Welcome to the forum. 
You hit the ground running with your first post!
Dave may have been traumatized by his middle school band director, but he's not "100%" wrong. Single lip vs. Double lip embouchure is simply a choice. It is not for me to say which one is better than the other. I prefer double lip as it feels more relaxed and open.
Thanks. I guess it was bad form to come out swinging on my first post. But the reality is "almost never" rather than "almost always".
As a new clarinet player after 50 years on sax, I was perusing this forum, and the jazz sax double lip claim got me a little worked up. Other than that, loving the forum so far and slowly adapting to clarinet, which I have to play a lot in the 20s/30s dance band I joined recently. I'm getting by, but still have a lot to learn.
Looking forward to more discussion. I'll try to dial it back some in the future.
