I've encountered students who have asked me, "how do I know that this is swing?" or, "what's the articulation on these eighth notes?" The question remains, is this a matter of time, talent or a matter of ears? I know that for me, I got a knack for some musical feel because it was on in the house all the time-- my mother was a music major and music teacher-- so I was exposed to a ton of genres. She made us listen to KDFC in SF (classical) two to three hours a week in the car. My second teacher was member of the Oakland Symphony. My dad had dixieland jazz blasting on the weekends and I took it in. Did this gentleman who asked me the above questions, have that kind of aural experience? Who knows, but likely not. Music can be learned, but only after hearing it!