Are you sure they said All on the Investor Call or elsewhere? I know they mentioned coming to S, X and 3, but I don't recall hearing All, but I could be wrong.
I think it was first mentioned on the Investor Call at the 53:42 mark of the call where he said "All Model 3, and S and X". Since the question was within the context of motor improvement of the new Raven power train, we can extrapolate that that it was specific to the Raven power train vehicles plus Model 3.
Unfortunately, it was also quite obvious to me when the power increase was specified. Since the Raven powertrain only shares half of its design with the 3, the 5% for one and 3% increase for the other made it easy to extrapolate that older S/X variants were not contextually referenced.