Thanks for making this, it fulfills a really important function on my site!
I'm a bit concerned as it seems to be malfunctioning. I have a 'Popular Posts' sidebar widget that I use your plugin for for ranking posts. It used to rank by number of comments with the following php:
$popular = new WP_Query('showposts='. $posts .'&orderby=comment_count&order=desc');
$popular = new WP_Query('showposts='. $posts .'&meta_key=views&orderby=meta_value&order=desc');
And it seemed to work fine. Now however it doesn't appear to be updating (I'm aware of the 3 hour refresh) and it isn't displaying my 'top' article according to my jetpack stats.
Is there something I am doing wrong, or someway to kickstart the counter to ensure it is pulling the value in properly?