Those of you who have been Following this blog, in the past, may have recently noted a new gadget in the sidebar.
Just below the "Follow Me" gadget, you'll see "+Follow Me". The latter gadget looks the same as the former, but has some subtle differences. Some differences are visible, others not so visible. And some differences are not visible to the eye - but will still affect your access to this blog.
The Google+ Circles gadget, which on this blog is labeled "+Follow Me", appears similar to the Following / Google Friend Connect "Follow Me" gadget - but appearances can be very misleading.
The larger pictures are one obvious difference - but that's not the most significant difference. Some difference need to be discussed now, rather than later, for maximum benefit.
Following / Google Friend Connect lets your acquaintances Follow a single blog. I have several blogs, and a different group of Followers for each blog. The Google+ Circles gadget shows everybody in all of your publicly visible circles, merged together. The merged concept may, or may not, be to your liking.
With Following / Google Friend Connect, your Followers can use email, or any number of newsfeed clients, to read the complete content of your blog - including each complete post, if you setup the blog feed that way. Google+ Circle members can read a snippet of any blog post intentionally Shared, in their stream - but will have to click on the link to the blog, in the snippet, to read the entire blog post. If you have read this far, that's what you have already done.
Following / Google Friend Connect works best for public blogs - and supports a reader audience of unlimited size. A Google+ Circle, likewise, supports a reader audience of unlimited size.
With a properly setup Google+ Circle, and a Blogger blog with a list of designated readers - and your readers properly accepting the emailed membership invitation, up to 99 of your designated readers can Follow your blog. As before, the limit for private blog distribution, as for any team blog, is still 99 members.
Anybody Following a blog, using the stream of any author of the blog, will see a snippet of each post Shared in their stream. To read the complete post, they will have to click on the link in the snippet. With a private blog, the reader will have to be a blog member, to read the complete post.
Many publicly visible Blogger blogs have Following communities which vastly exceed my 4700 member population (my "Follow Me" gadget, as of April 2013) - and the possibility of losing those communities will not be willingly accepted by everybody. The integration of Following with the newsfeed subscription - and with the dashboard Reading List - is not automatic with Google+ Circles.
A blog with multiple authors (aka "team blog") will have either a Google+ Circles gadget for only one author - or multiple Circles gadgets, to fairly let people subscribe to the various authors Google+ streams. Neither solution will be exactly equal to the Following / GFC blog feed subscription - especially if the various team members are similar to me, and my range of interests.
Similar to the team blog, we may wish to consider the multiple interests of each blog owner. I am one person, with a number of interests. People who have intentionally subscribed to the newsfeed from this blog, and are specifically interested in my blog about Blogger blogs, may not be extremely interested in my blog about cooking - nor in my blog about jokes, pranks, and miscellaneous ramblings. Unfortunately, if you Follow my Google+ stream, you'll get a bit of each subject.
Again, the Google+ Circles gadget appears to contain the total Followers for one person, for all interests of that one person. I have not yet found a tool that will allow me to analyse the interests of each of my Followers, and to accurately determine the specific areas of overlapping, between my own personal interests and theirs. It will be impossible for many blog owners to keep an accurate Circle complement, and segregate each circle according to interest, so they may Share only relevant material with the specific members of each different Circle.
As the Google+ Circles gadget evolves, some significant improvements - and some compromises - will be required. Like the Internet, Blogger, and Google, are constantly evolving. This may require compromises by many Blogger blog owners.
We now have a rollup discussion, where each blog owner is asked to provide their thoughts about the above described issues - and possibly, others that concern you. Anybody who experienced the Blogger GUI upgrade of several years ago may, from experience, realise how much better off we may all be, with these issues discussed now - rather than later.