Sorry, Nollster.
The general definition of a benchmark ball is one that will tell you quickly whether you need a milder or a stronger ball. Being there aren't many balls that are a lot stronger, the Rush does not meet that criteria.
Look, I agree it is one of the better balls out there. I like mine, but only on long mediums, WHEN highly polished, or on medium-heavy oil patterns.
The unfortunate thing is that it is on the stronger end of balls; it is the goto ball when your real benchmark (Silver Streak, Retro-Resurrection, Brusier, Shock, Nemesis, Vendetta Black) does not react strongly enough.
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"When we choose an action,
we also choose the consequences of that action.