subfloor mass - cleats vs screws

In Rod's book, it shows cleats as the method for securing drywall up under a subfloor (between joists). Is there any reason why this is preferred to just screwing the drywall up into place assuming that you have enough material to screw into? I have 3/4" sheathing with solid wood floors above - so plenty to screw into.. and it would be WAY easier for me to do this (joists are wood i-beams, so there's a funny lip to work around if I try to cleat them into place). Thoughts? Grats.

The screws are fine. That's what we recommend. Screws also provide the requisite pressure to compress the Glue. The general concern may be regarding selecting a screw that is too long and penetrating the finished floor above. Another concern may be that in some multi-family scenarios the underside of the subfloor above simply isn't your property and you therefore cannot touch it.

Thanks, Ted. I'm not using GG on this layer - only between the two layers on the new wall .. this is strictly adding mass to the existing floor, though I guess that's irrelevant here (except for the glue-squishing part). Anyone else have a good reason not to use screws?