Sorry, I didn't know where else to post this, but is there something going on with Stack Exchange's servers lately? The Stack Exchange sites have been pretty poor performers for the past couple weeks.
EDIT: More details: basically even just going to stackoverflow.com makes my browser sit there, loading & loading. Sometimes hitting ESC to stop loading and going to the URL again will work. There are also random stalls (as users noted below) while upvoting comments, etc. I'm in a major metropolitan city with a fast connection, and all other sites are blazing fast.