It is interesting that this is part of today's gospel reading:
For there shall arise false Christs and false prophets and shall shew great signs and wonders, insomuch as to deceive (if possible) even the elect.
It appears that the so-called EM's at a NO service are deceiving the elect.
To answer the poster above, I found this regading what ABL said about the New Mass:
Archbishop Lefebvre did not hesitate to speak publicly on the question of the orthodoxy and validity of Paul VI’s Mass. He considered that “one cannot say generally that the New Mass is invalid or heretical”; however, “it leads slowly to heresy.”
Why would Christ confirm a service that "leads slowly to heresy"? Also, regarding validity, the Church teaches that the Orthodox liturgy is "valid" but we never hear of EM's at Orthodox liturgies.