Starting a relationship with a small label is all about making friends. Sending it to the wrong label is not a big deal. Never try to second guess what the label guy thinks, just let him or her listen to it if they get a chance. Some label people I know just love listening to tapes. Even when they know they won't put it out, they still sit around and listen to them.
Some people just fast forward through it and decide immediately.
Some people will never even listen to your tape. Don't get hung up on pass or fail bullshit. The label might like it, put it out and its still crap. You might hate the record in 6 months. You can put out crap and you can fail to put out good stuff.