SWIM has not found that to be true. It came up always in the same speed (once even quicker) when taking the freebase than taking in acid form. Sure there are possibly other variables that SWIM doesnt remember now, such as how long since last meal and so on, but in any case the fact is there was no significant difference in speed of absorption, for SWIM, in terms of dmt acetate, citrate, the original salt (tannate?) and freebase. People seem to say phosphoric makes it quicker but SWIM never tried