No, i cannot buy into twist being important, except to stabilize the bullet.
In the 1:28 Omega barrel, the bullet will rotate once every 28" it travels. The bullet will rotate once as it travels through 5 of these jugs.
If one were shooting a rifle with a 1:20 twist barrel, the bullet would rotate once every 20" it travels. The bullet would rotate one revolution when it travels through 4 of these jugs, and 1 1/4 revolution when it went through 5 of these jugs.
To me, whether a bullet goes around once, or goes around 1 1/4 times would have, little or no effect on the affect it has on any of the 5, or 6 jugs.