The latest information on the Companie Du Mont-blanc website says the following.
“The Grands Montets ski area will be open continuously from December 5th, 2015. Timetable: From December 5th, until December 18th 2015 included. First departure from Lognan at 9am, last round trip at 3:45pm, last one-way mountaineers 4:15pm and last descent from Lognan at 4:45pm. Have nice day !”
This is great news and means the conditions up on the mountain are better at this time of year than they have been for a number of years.
Lets hope there is more on the way!