So far neither side has provided proof as to what works the best for overseeding. Aerate, seed, and drag. Seed, then aerate, then drag. Slit seed then aerate, then drag. Triple seed--and no prep. Remove dead grass--put dead grass back for mulch--as if it were straw to cover the seed.
Try more than one method--and--tell us which is best. If you have a favorite method, what proof do you have that it is better than other methods?
Of course, a lot depends on if it is bluegrass, rye, tall fescue or a mix. And irrigation or weather.
And overseeding of Bermuda for winter color--is a whole different ball game.