Google +1s Quality Factors?

[SEOGroup123]

It is apparent that Google +1s are becoming an increasingly large factor in results pages and I had a few questions about some of the dynamics.

• Do +1s take into account factors such as c-blocks, location diversity based on IP, and similar elements?  To what degree?
• Do +1s from well-diversified and historically more active/authoritative G+ accounts carry more weight than someone who simply has a G+ account because they use Gmail and were prompted? What is the spectrum here?  How much weight would a +1 from Rand Fishkin hold in contrast to an account created one year ago with little activity? I know Google has a great deal of user data from Gmail, YouTube, Calendar, Docs, search history and many more so would imagine this plays a role.
• Do +1s from newly created accounts that only target one business or niche cause damage?
• I am assuming that +1s should accumulate naturally just as backlinks so if what would be considered an unnatural amount of +1s in what time period?

Any insights here are greatly appreciated!