"Swing" is contextual, and wondering if we need better words to express what folks are trying to say. In traditional usage, "swing" was seeing a chart with straight 8th notes, and knowing to shift to dotted eighth/sixteenth pulsing (hokey), or to a triplet feel across each quarter note value - which is deeply rooted in African and Afro-American traditions (and...wait for it... Scottish parade drumming!) that play 3 against 2. Thinking that ahead/middle/behind the beat is a whole 'nother thing, which could apply to all of the above. Maybe the issue is the word "swing," which perhaps gets used in a different way than back in the day. If "swing" is code for what loosens your inhibitions, feet, and hips, then the ahead/middle/behind analysis is spot-on. But ahead/middle/behind is a mode of analysis that could apply to straight notation, straight notation interpreted by skilled players, to folks playing together with open ears and hearts, or a parade of feral pigs crossing the road in front of your vehicle.