Last time we had an article about this sort of thing (a few months back?) the difference wasn’t big between generations, at similar ages. Under 5% difference between current 20-somethings and the Boomers, IIRC. Up, but not that much. This could be a different dataset though, I dunno.
This article has a graph going back over a century. The percent of young adults living with parents in 1960 was only 29%, so I'd say the current value is pretty significant.