Thanks for your feedback! Very well put.
As we've been working on Banterly for the past few months, we've had a lot of the same thoughts. That's a big part of the reason we decided to focus our product on the Twitter community first. Our hope has been that as people discuss topics around various #hashtags that they will have a way to take the conversation to a deeper level rather than overwhelming their followers with @replies.
The comparisons to Convore are more at a feature level and prompted because many of our original ideas were geared toward giving the IRC community something more "up-to-date" (though it's hard to say whether or not open source programmers currently using IRC will ever really leave for anything else anyway).