Like I said, the short pithy comments have their place too, but for me this strategy is what I prefer. Also, I haven't seen solid evidence that people are building larger audiences on Google+, unless you're someone like Robert Scoble. You have to have an established name in your industry, or at least that's the trend that I've seen thus far.
I could post to my blog and then throw links on G+ (earlier buzz), but the extra friction of clicking on a link caused comments (and therefore, I think, reads) to go down. So I need to put some thought into putting some content next to the link. But at that point the effort suddenly seems prohibitive for a short post. Far simpler just to throw it directly on G+.
I've tried twitter, but I don't have many followers and there's just too much attrition due to people just missing my tweets. Friendfeed/buzz/G+ have fewer longer posts, and so there's less churn on people's streams and less attrition. Posting something on them is less meaningless than on Twitter.