Just spoke to Adrian on the sat phone (May 20th - 6am PST). Our team of 10 climbers, 3 guides, 1 Discovery Channel cameraman and 11 Sherpas are now getting a few hours of rest before their summit attempt.
The members took between 4+1/2 and 6 hours to climb from Camp 3 to Camp 4 at the South Col, experiencing some delays on ropes as they waited for descending climbers who had summited yesterday, but no significant problems.