I have X3 and X2, and both are working just fine. Start is somewhat slower, I can see that they try to contact the DRM server @LGP (via wireshark) and fail, but given the fact that my keys have been verified, the games work just fine.
Never the less, LGP should find a way to solve this problem. E.g. use a an external hosting for their DRM servers?
DEV: Intel S2600C0, 2xE52658V2, 32GB, 4x2TB + 2x3TB, GTX780, F21/x86_64, Dell U2711.
SRV: Intel S5520SC, 2xX5680, 36GB, 4x2TB, GTX550, F21/x86_64, Dell U2412..
BACK: Tyan Tempest i5400XT, 2xE5335, 8GB, 3x1.5TB, 9800GTX, F21/x86-64.
LAP: ASUS N56VJ, i7-3630QM, 16GB, 1TB, 635M, F21/x86_64.