No they have not. The capacity of the Cowboys stadium is 80,000
ARLINGTON, Texas — The game between the New York Giants and Dallas Cowboys on Sunday night at new Cowboys Stadium set an NFL regular-season attendance record with a crowd of 105,121.
http://www.nfl.com/news/story/09000d5d812c91b4/article/nfl-regularseasonrecord-crowd-of-105121-sees-giantscowboys