I think I have to take serious exception to one statement in Gary T's post. It said, "It has been pointed out to me that most people don't give a rat's ass who wrote the song. Mention the songwriter only if there's a specific reason to do so." It even may be so (particularly at a bar gig), but I care, & I know at least some people in the audience do also. If your intro is too long, then shorten it, but not the 10 seconds it takes to acknowledge the writer whose creativity gave you a song to communicate.