"In three experiments, we trained adults to name pitches for 12 to 40 hours. Within the training period, 14% of the participants were able to name twelve pitche

"In three experiments, we trained adults to name pitches for 12 to 40 hours. Within the training period, 14% of the participants were able to name twelve pitches at 90% accuracy or above, a performance level comparable with typical AP possessors." This sounds like good relative pitch, with a memorized reference tone. Absolute pitch doesn't fade in 12 to 40 hours. Many musicians have relative pitch abilities that look, to observers, like absolute pitch, because they've memorized a reference tone sometime in the recent past and can find any other note relative to that reference (some folks also use their own voice as a reference tone, because they know the top and/or bottom of their range, or how a specific note feels when they sing it). I only have the summary to go by, but this sounds quite different from absolute pitch and quite similar to relative pitch. We've always known people can acquire very good relative pitch recognition skills as an adult. That isn't new or groundbreaking (though if they have a training regimen that works fast enough for a study like this, that would be great news, since ear training for very good relative pitch recognition is a months or years long process for most people).