The
LEGO Education web site indicates that the EV3 will not be allowed in the 2013-2014 FTC Season.
This web page also states that TETRIX, ROBOTC, and LabVIEW for LEGO MINDSTORMS will support the EV3 in "fall 2013." It is likely that fall 2013 availability for critical components is too close to [or after] the FTC season kickoff in September to be allowed.