I think everything varies by school, so understanding how the schools you’re applying to do things (where past threads on cc are very helpful) helps. Blanket statement might work for most schools, but if you’re applying to one of the others it can be useful to know if they do things a little differently.
Btw I might be mistaken but I don’t recall seeing anything about rejections before the EA deadline on the UMN list (so in that sense it doesn’t seem to be exactly the same thing as rolling decisions). Wild speculation but maybe they have something that flags the applications that look particularly good on paper for earlier evaluation.