Is there a library community in the blogosphere? Or has it moved to twitter?

I have blogged for nearly five years. And in that time it seems (to me) much has changed. I love blogging (mostly) and even did my masters dissertation on the subject. I might sound like an old man (wait, I AM AN OLD MAN), but I feel that the library blogosphere has changed. I enjoy blogging because it creates a conversation, especially when you get comments.
I blog, but also comment on blogs in the library blogosphere. What really annoys me though is I may comment on a blog and I get no response. Many bloggers do responds to my blog and comments and thats good, because it creates a readership, a relationship and a community. But when people don't respond it creates. Nothing.
The thing is, within the UK we have some really socialable librarians and bloggers. http://woodsiegirl.wordpress.com/ have created new Professionals Information Day. Not only was their blog used to advertise this event, but to have a social event after but a social meet up after the event.
Other bloggers Like Owen Stephens, Phil Bradley, Dave Pattern and Brian Kelly amongst others have created library mash-ups in an inexpensive manner.
This has created a conversation and a social gathering point (whether it maybe if you were at the events or read about it). This creates community.
So what is my point? I feel within my period as a blogger, people don't communicate so much via the comments section (or do I mean MY comments section?). In many ways this is due to the loss of some great library blogs like library crunch and shifted librarian has reduced her blogging. But my biggest thing that now the comments section seems to be found at twitter. I mean i'm a user of twitter (but not a regular user), but most of my comments and conversations seem to come via twitter. Twitter users answer my questions. It seems that the conversation has moved to twitter.

Reading on the way to work

Having started my new job has given me time to catch up on plenty of reading (1,2,3) I have just started The Devil's Cup, which looks at the history of coffee. As a blogger, I was interested in the London Coffeehouse's, especially Richard Steele, who created Tatler in one. The book quotes the coffeehouses of the time, who could be writing of bloggers when they says:-
Coffeehouses had made civilised conversation into a popular sport.