Yes, for SP voting and allocating from the reward pool, 100%. It's weighted by how many SP votes are used. If none of the majority holders of SP (less than 1% of users who have 250k+) used their SP, everyone else has greater influence and more allocation for posts each time they vote. Last year 45 accounts held most of the SP. I think it's a bit more dispersed now... but who knows who is a real person... since many of the rich just duped accounts and spread it around to appear less rich lol.