How much weight do Twitter Lists carry in Google's determination of user influence?

[Thos003]

I have come across a number of Twitter users that have 1000+ Followers, and they typically follow 1000+ people. I've noticed as of late that many of these people are found on fewer lists. I also know that many twitter users are selective about who they actually allow in their main twitter stream and therefore create lists to manage who they follow.

Any thoughts on if /how twitter lists contribute to a user's authority and/or influence from the SERP's perspective?

[KBolsinger]

It seems to me that that would almost have to be part of the puzzle. If you read, which I know you have the SEL post on what social factors Bing and Google look at it touches on it if only peripherally. re:

3) Do you calculate whether a link should carry more weight depending on the person who tweets it?

Bing:

Yes.

Google:

Yes we do use this as a signal, especially in the “Top links” section [of Google Realtime Search]. Author authority is independent of PageRank, but it is currently only used in limited situations in ordinary web search.

I can't help but think that the number and type of lists a person's Twitter account wouldn't be an obvious thing for them to include in their 'author rank'.

Also the previous question hints at it as well:

2) Do you try to calculate the authority of someone who tweets that might be assigned to their Twitter page. Do you try to “know,” if you will, who they are?

Bing:

Yes. We do calculate the authority of someone who tweets. For known public figures or publishers, we do associate them with who they are. (For example, query for Danny Sullivan)

Google:

Yes we do compute and use author quality. We don’t know who anyone is in real life

Also - if you think about it this could be symptomatically included as well. Because a person is included on more lists on specific topics (or not) they are likely to be more popular, which is likely to coincide a higher number of followers, RTs, etc. So maybe it's not directly related but it's a sign.