I find myself wanting to get into this discussion because it's all music I'm familiar with--I started out playing bluegrass rhythm (boom chick), became a fan (though not a player) of western swing, and finally as a bass player I'm doing a dive into walking jazz bass and the work of Paul Chambers in particular.
At the risk of muddying the waters, since Roly Poly was mentioned, here is a version by the Quebe Sisters which I think expertly demonstrates the use of double time, and a two feel, and 4/4 in the same tune to add dynamics and propel the music where needed. Is this at all pertinent?