My experience of G+ is that no one really wants to be here. It's a half way house between the other networks which isn't really working.
For me the only return I get is a funky picture next to my blog posts. Which is kind of cool so worth persisting with.
Other than that I feel I would get the same experience out of a mixture of LinkedIn and twitter. +Ann Hawkins
link is interesting and maybe shows that it's not very useful for small businesses.
I will persevere but hopefully it will stop feeling like a chore, other than the excellent Social Media Show community that is ;)