Oh, none of them are like the snapshot, but I can't see the snapshot that clearly. Is it smooth-blurred? It gets that way at stupid-high blurcounts, but at lower ones (with four or five images following the Medusa arms) it more looks like a series of snapshot 'afterimages' following.
And Teleguise, the less-swirl could be due to your card not being able to keep the framerate up... I've noticed that when the framerate drops, so does the motion of things like SnakeCube and Medusa. Conversely, when the framerate is stupid-high (300fps+ on snakecube) it spazzes out and pretty much wraps around itself incredibly tightly because it's spinning so fast.