The sunshield covers were retracted over a day ago. By now, according to this schedule, both port and starboard sunshade booms should have been deployed.I am not saying that there are any problems, but today's activities appear to have been a lot slower than expected.
From the teleconference:They have 6 motors used for tensioning. They monitor their temperatures and will stop any time they reach a temperature limit. They can pause any time and even backtrack if needed.
The efficiency of the Ariane rocket will allow JWST to operate "a lot more than" the initial ten years.