Aggressive rollover isn't the actual cleaning action, it is a side effect of very strong water currents at the bottom of the tub, a concept invented by Maytag with their "Gyrator" agitator versus the previous oscillating dolly types. Rollover is however needed to insure that all clothes get their turn at the strong water currents, henceforth the addition of a cork-screw does actually help cleaning action.
In clothe-less demonstrations of the new SQ, there are hardly any water currents to be seen, on the new Maytag, however I could actually see it forcing water currents through every fiber, the SQ, not even close...
To conclude, these are just marketing buzz words used to paper over the glaring flaws in the design.