Day hiked the Main Whitney trail 5/24. Began around 2am and finished around 6pm (slow on the way down due to some people having symptoms from altitude sickness). Our group used trekking poles and microspikes which were adequate, although some sections along the switchbacks were still slightly sketchy. The two snowy/icy sections along the switchbacks are the cables and the 80ft section right before trail crest.
Benc, thanks for posting. I'd like to see the pictures, but the links you provided don't work. If you can post a link to the group of pictures, maybe I can get a link to them that works.
