So I recently moved over to the popular Disqus Comment System. It has a lot of features that Blogger comment doesn't have, such as Reply, Like, sign in using multiple IDs, etc.
However, I've also noticed its downside. Of late a few comments left on my blog were NOT published for public viewing. When I login, I could see the comments through the Blogger Dashboard, and I also received alerts in the email. However, I couldn't see these comments from my blog's public domain -- that means other bloggers can't see them either. Also, I noticed the site now takes much longer to load with the Disqus plug-in.
Now I am thinking of reverting to the default Blogger comment. Are you experiencing similar problem with comments not showing up? Slow performance?