Found a very interesting article that looks at an analysis of about 4,4 million +1 users (using findpeopleonplus.com) and then analyses the profiles.
Here's the article:
[
readwriteweb.com...]
About 71% of members are male, and the main occupation is from the IT profession - engineers, developers, programmers and so on.
It's clear that what's happened is that the first invites went out from google engineers to their primarily male friends, and is very slowly spreading through the population. Interestingly, after Google, the main employer was "self employed" - a bunch of internet marketers no doubt!
Anyway - I think it will be sometime before Google uses +1 data to influence search results simply because their membership does not look like the demographic of web users at all at the moment.
For example, for the niches I work in, customers are not on +1 at all, and probably won't be for a couple of years.
I just thought I'd post this as an antidote to all the panic about getting +1'd!