For the OP's questions . . . The comment in that thread he linked concerning Acros is, so far as I have ever read, bizarre.

The only film I've seen which developed with an accelerant was a graphic-arts lith-film for use in a large pre-print system (Agfa something??) and the material came in a cartridge affair. This was thirty years ago mind you. It looked to be that the developer was in the material then was activated by the liquid bath (perhaps similar to the rapid-access print proofing systems?), but all locked away inside the machine, giving a dry result in a minute or so. For a camera film? Never heard of it.