Someone bumped this thread, which reminded me of an experiment I conducted a few weeks ago, mostly in response to this comment or one like it. I'm also a big advocate of AM radio, for what it's worth. But in a pretty remote area of Michigan's upper peninsula, I tuned through both the AM and FM dials and counted how many stations I could get. I counted them if I could make out most of what they were saying, so I didn't count faint carriers, or snippets that lasted only a second or two. I tuned manually. On the AM dial, there were three stations. On FM, there were about 30, and a surprising number were in the 88-92 MHz educational portion of the band.