While I really love the new commenting system, look, feel, threaded functionality, be aware that the email part (both notification of comments and replying to comments via email) is very unreliable. For instance, I have yet to receive email notification of any comments posted since last night, of which there are about 10, now.
In addition, comment replies I sent via email often don’t show up, so if you have replied via email to a comment, you might want to verify.
Their support people are very responsive and I’m working with them. As long as you work directly from the post, everything seems to function fine.
in addition, there is a new all comment feed, which I’ll be switching out with the current comment feed link in the header. The new feed is: