::About the first bit:  You're right that when I put something in ==External links==, it means that I didn't use it as a reference (even if it's usable as a ref/contains information that the article also contains).  But I'm not the median editor; I'm one of the folks at WP:EL who explains that EL is not RS, just like the EL guideline says repeatedly, sometimes in bold-faced text.   
 ::In the real-wiki-world, we get people "helpfully" changing the ==References== into ==External links== if it only contains URL-containing general references.  It's not difficult to imagine someone listing eMedicine as a general ref in a tiny stub, someone else renaming the section, and a third editor helpfully moving it to the infobox.   
 ::But more often, I suspect that these really are unref'd articles, in the sense of "none of the people writing sentences in the article actually read the eMedicine source", even if the eMedicine source actually does contain all the information.   
 ::I think I'm going to err on the side of losing unref tags for stubs that contain a "possible" source in the infobox. 
 ::(About WPAJ, notability never requires sources to be named in the article.  Subjects are notable if the sources exist, anywhere in the world, regardless of whether they are named in the article, or even if the editor who wrote the article believes the sources to exist.  But I'm not convinced that I'd accept the publisher's own website and routine inclusion in enormous databases as an indication of notability.)