Q:  12.29.21  9:43 pm if a triplet swing is 1 2 3 1 2 3 with beats on 1 and 3, a quintuplet swing is 1 2 3 4 5 1 2 3 4 5 with beats on 1 and 4
A: no one who's actually swinging is counting anything. but, i would also argue that most 'swinging' is much naturally much milder than the 1_3 example you gave, AND i think still even lighter than the 1 _ _ 4 _ example you gave. it seems like most 'swing' in the real world probably has the offbeat note somewhere between 55% and 60%. anything beyond that, i find, seems too hard. full triplet would be 66.6%, and if you recall some of the quantized triplet-swing recordings from the 1980s, it sounds pretty absurd