According to Lucasfilm the release of Episode VII will not be delayed.

Following a rumor picked up on earlier today by Jedi News stating that a meeting to discuss delaying the production of Star Wars Episode VII has taken place at Pinewood, TheForce.net has reached out to a spokesperson from Lucasfilm to comment on a possible delay. They were told the following information.

http://www.theforce.net/story/front/Lucasfilm_Says_No_Change_In_Episode_VII_Release_Date_Following_Fords_Injury_158595.asp

 http://www.starwarsunderworld.com/2014/06/lucasfilm-episode-vii-release-will-not.html

Sources: TheForce.net, Jedi News