What criteria are being used to determine the roll-out of Twitter's new Lists feature?

I don’t have it but my guess would be user id, rewarding the oldest users.

I think it’s just degrees of follow from current twitter employees..

@timtrueman that’s a good guess, but I know someone with a newer account than mine who has the feature

I apologize for being so twitgnorant (twitter ignorant, get it? cause they love portmanteaus on twitter!), but what are lists?

@Sarcasm Nick Kallen offers a good introduction here. It’s an awesome feature. I want it. NOW! :)

I manage an embarrassing number of Twitter accounts, and it seemed that any account would get the new lists feature almost immediately after it was added to a list by another user.