Ajax Comments Wordpress Plugin is used by 7 websites. Among 7, 0 site is within top 10,000 and 0 site is within top 100,000 websites.
Wordpress Plugin Information of
|Plugin Meta Name||Plugin Meta Information|
|Plugin Description||Post comments quickly without leaving or refreshing the page.|
|Detail Plugin Description||
More than that, it checks if all fields filled correctly, and also makes sure to avoid comment duplication, and has flood protection capabilities as well.
Probably one of the best ways you could spice up your WordPress Blog with AJAX; readers love it! Must see for yourself.
Ajax Comments known to work well, with Authimage plugin, but I rather suggest Akismet, as it is free for personal use.
Wordpress Official Plugin Repository