I talked to DoA last night via email and he is on a drill ship somewhere south of LA, too, and he said there were big swells. I would guess that with the drill ships' DPO systems maybe the folks aboard them don't feel it as much as those on the semi-submersibles do.
Hopefully, you won't be out there but one extra day (and the extra OT eases that frustration a bit).
What rig are you on?