I doubts that 90% of ballers could achieve 15bps on true semi. But I know what you meanyou mentioned you play bass and you felt that this would give you fast fingers. A friend of mine was in this position when he started, he could get a reasonable rate straight away but couldn't improve. If you relate the speed in semi mode of 15bps to music, that's 900bpm. I doubt there's many songs you play with that sort of beat.
ye mate just introduced my third finger so can now do trippleitsyou mentioned you play bass and you felt that this would give you fast fingers. A friend of mine was in this position when he started, he could get a reasonable rate straight away but couldn't improve. If you relate the speed in semi mode of 15bps to music, that's 900bpm. I doubt there's many songs you play with that sort of beat.