In The Force Awakens, it would seem a lot of the "new" designs for characters and objects are, in fact, highly informed by concept art that was generated during the early stages of development on the original Star Wars.
In particular, Rey seems to be very similar to the concept art produced by Ralph McQuarrie during a period of time when the character that would become Luke Skywalker was going to be female:
Found at: www.StarWarsUnderworld.com
The article cited in the link above merely speculates that these designs were used to influence the character, but I'm looking for concrete evidence that the production team involved in designing The Force Awakens purposefully used McQuarrie designs, and the Female Luke design in particular, in their concept stage. Was this explicitly mentioned anywhere in any articles or interviews?