While I agree that Bono may not be a "genius" in any way (I have stated that before in his thread) I disagree with those who say that he and/or U2 haven't done anything so innovative it defined a whole generation of musicians. I think by saying that you're downplaying their role in music history. I honestly believe they have made music which has created sounds and emotions that no one has done before. Maybe as a group, they can come close to being "genius". And Bono as an individual has certainly been doing things that set him apart from the rest of society, even from the rest of the music world, I don't think there is any use denying this.
What I find a bit annoying about this thread is that we cannot seem to agree that the term "genius" can not be used for people like Bono without having to bash the guy in some way or the other. It's like: Damn, why aren't you a fu***ng genius! I think this is unfair.
As for his lyrics, as I said, these are so Bono and they are, too, what makes U2's songs so special. His lyrics aren't bad, the topics may have changed, but they are coming from his heart, and I think that only if you look at them superficially you may find them "bad" or stupid. I take Bono's lyrics over any of the complicated intellectual stuff any day, because they are part of why I love this band.
Having said that, I think U2 have really managed to do "their own" over all these years, to be unique. That's much more than most of today's bands can do. So maybe that's the thing that makes them "genius" as a band.
As for Bono's speeches: I think he samples a lot from different sources and also from the Bible, he uses a lot of scientific research and political quotes to emphasize what he wants to say. Most of his speeches are written by himself, but as any other speaker on the political, economic or scientific stage, he HAS to use a lot of other material to make his points stronger. That's what makes him competent in this field. He has a way with words, he knows how to communicate.
I think his rhetorical skills may be shown even better when he's doing interviews, because they are more spontaneous and he's not so prepared like when he's doing speeches. That's where his competence is really showing.
His speeches combine emotional appeal with facts, just like it has to be, I am always amazed by them. To repeat things over and over again is a powerful tool, used a lot in politics. His abilities in the political field are not so much that he can come up with ideas, theories and concepts all by himself (which, as we all know, he can and does a lot), but that he is able to draw from others, to study and learn, to communicate and to know how persuade people, win them over and establish the right connections.