The "contribution to page load time" of the plugin (assessed by Plugin Performance Profiler) jumped by almost 10x with one of the 2 recent updates to PowerPress plugin.
A month ago it was 0.0325s and now, after the updates, it's 0.252s (via P3). I investigated after my resource use on server shot up.
Current Piegraph screenshot: http://screencast.com/t/UqDCQYORh
Prior Piegraph screenshot: http://screencast.com/t/Z9xPz5p9iVh (you can see the plugin is minding it's manners here, for the most part)