Nick66
Rock n' Roll Doggie ALL ACCESS
I don't think the author of the letter intended anyone to think it was Bono. Is there only one Irish singer in the world? It's not like it said, "A certain Irish singer."
Of course he did. Otherwise, what's the point of being coy about who it is? The whole point of keeping it a secret is to get people guessing who it is. And whoever this singer is happens to have at least a passing resemblance to Bono's voice. And some would argue more. There's no other "Irish Singer" that would cause the kind of it excitement or speculation that Bono would. The fact that U2 websites everywhere have spent pages debating this is evidence enough of that.
I'm not saying it is Bono...but I think they wanted to us to assume it was.