I've read that Versailles' room style where changed every year in the summer and winter. I heard that MA's room style is the one she left when she went to the Tuileries.. So in late Summer / Fail. (only for the tapestries. )
Nevertheless, in 1722-1730 there were big works in Versailles, they made new woodworks.
So the decors aren't from 1715 (date of Louis XVI's death).
But as perfecciona said, there were a lot of changements. After Louis XIV's death, the priority was given to confort. They also had to solve some problem (too much people in Versailles' rooms.. and not enough room .. poor courtisans!) so they changed a lot of things in the 1st floor. They created new rooms, and living rooms.
The website is actually showing how was the 1st floor in 1715 and how is it now .. (ex : L'escalier des Ambassadeurs was destoyed)
... Now the Hameau de la Reine in Versaille is open :p (My favorite part of Versailles... )
