Not really sure that's fair, steve, and anyway who wasn't "on the bottle" back then? And if you mean "alcoholic", then Churchill was (apparently) not, although he did drink a lot:
http://www.winstonchurchill.org/learn/myths/myths/he-was-an-alcohol-abuser
But more important, Churchill was a great speaker long before his war speeches, and if he is remembered mostly for those it's because we have recordings of them -- and he was pretty good after the war, too, such as his "Iron Curtain" speech.
Finally, what is wrong with a speech being jingoistic propaganda anyway? Churchill said what was needed to be said, how it needed to be said, and when. Given the depth of the crisis, we sure needed a bit of jingoistic propaganda to see us through it.