Never confirmed, though considering Super seems to go by the Kai anime's continuity, I wouldn't doubt that being the case. Either that, or Goku and Vegeta just made huge training gains.
Manga-wise, Goku/Vegeta > Gohan is never established so you could argue that to not be the case there, though Goku still made enough of an increase his SSJ form was arguably as strong as Pure Boo.
It's nowhere near as ridiculous as Piccolo going from his Boo Arc power to being above the post-God Base Saiyans in a few days, at least.