If you look at netcraft's realtime global status link it sure seems like they are saying it's ongoing. They show mostly failure from all sites over the past 8 hours, and all locations minus romania failed the last test ~15m ago.

http://uptime.netcraft.com/perf/graph?site=www.wikileaks.org

They have enviable RTT stability as well, even for a site not being DDOS'd:

  tsl@crabapple:~> for i in {1..10}; do curl -s -w "%{time_total}\n" -o /dev/null http://wikileaks.org/4oh4$i; done
  0.176
  0.180
  0.177
  0.174
  0.176
  0.174
  0.174
  0.177
  0.174
  0.176