The Scenario
Greater Sci-Fi combatant
Those are highs compared to the rest of the show, and a few weren't done casually. Buttercup struggled with the mountain, while Bubbles was completely casual and for most of the race; she thought she was just supposed to keep up, and when told it was a race she completely outclassed her opponent. Blossom's was also done casually, she had more trouble figuring out where to hit the meteor than actually shattering it.
The FTL feat was a struggle, and they'd never tried that hard before. The sunburn was implied to be only due to the flare, though it's a bit high for them.
Their average is closer to casual city busting stuff I think, with scattered higher and lower showings. When shown to try, they're a bit higher. Though it isn't the most consistent show by any means.