With latest version, i did some testing using numion.com - This website is for sale! - numion Resources and Information. i measured page loading with news.com, bestnews.com and this board of-curse, all were within few hundred of millisecond margins i repeated the tests 3 times per site for enabled/disabled and cleaned cache and cookies between.
HOWEVER
After few hours of saturating the connection with emule, delays are back followed by the infamous CPU spikes. news.com up 10 seconds betanews.com 12 seconds, the board 2 seconds.