I think it's more likely that the Horcruxes are static copies, like system backups, and Quirrel's zombie periods are because the original Quirrel is, in fact, still present in some lobotomized form, and Voldemort is merely imposing his soul / brain state onto the tissue by force of magic. While he can maintain it, it is costly, and he conserves strength by letting the damaged brain run the body most of the time. It might also be the case that this is to preserve the livespan of the possession, since Voldemort's presence in Quirrel's body appears to be slowly killing him.
A static copy couldn't learn, think, or experience time. A static copy is inert. I could imagine horcrux-magic automatically overwriting the brains of people who come into contact with them, so that Quirrell would become Voldemort, but the horcrux can't be static if Quirrell is still present in lobotomized form. In that scenario, neither one is a running copy of Voldemort.
But the idea of horcruxes as copies may be correct.
..."Harry, how could Voldemort have survived the death of his body if he did not have a soul?" [...] "Good question,"
The new discussion thread (part 15) is here.
This is a new thread to discuss Eliezer Yudkowsky’s Harry Potter and the Methods of Rationality and anything related to it. This thread is intended for discussing chapter 82. The previous thread passed 1000 comments as of the time of this writing, and so has long passed 500. Comment in the 13th thread until you read chapter 82.
There is now a site dedicated to the story at hpmor.com, which is now the place to go to find the authors notes and all sorts of other goodies. AdeleneDawner has kept an archive of Author’s Notes. (This goes up to the notes for chapter 76, and is now not updating. The authors notes from chapter 77 onwards are on hpmor.com.)
The first 5 discussion threads are on the main page under the harry_potter tag. Threads 6 and on (including this one) are in the discussion section using its separate tag system. Also: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13.
As a reminder, it’s often useful to start your comment by indicating which chapter you are commenting on.
Spoiler Warning: this thread is full of spoilers. With few exceptions, spoilers for MOR and canon are fair game to post, without warning or rot13. More specifically: