
most a & r's are idiots. and they don't last long. VERY high turnover rate in the A & R departments.
actually, i don't think an a&r guy needs you as much as you need him. he's the guy that will get your beats to artists. but think about it, he doesn't really need you as much as you need him because there are a whole LOT of producers and wanna be's out there for him to pick from, but not that many A&Rs for you to get your material to. So the A & R guy is a lot more valuable to you than you are to him.
A lot of them don't take unsolicited material. And if they do take it, its going to end up in a stack of other beat CDs and may or may not ever get listened to.
And of course ALWAYS check the paperwork with a good entertainment lawyer.
If your trying to shop a demo, be persistent. The squeaky wheel gets the grease, know what i mean? F*ck it, send those cats a CD EVERY DAY, at least it will get them to notice you, lol.
So to answer your question, yes an A&R guy can be your savior, but i wouldn't expect too much.