I mean even if ONLY orthodox are saved, there are still A LOT of orthodox, since orthodoxy is a large denomination.
Orthodox would deny that they are a denomination. But I don't want go get this thread off the OP.
Now if I were to ask a protestant about there being ''a lot'' of protestants, the answer would be is that most nominal christians are not true christians (which raises the question how can I ever know I am true christian). But Orthodox can't possibly answer that, because in Orthodoxy as long as you get baptized, go to confessions, do the 7 rites, accept the interpretation to the bible offered by church fathers, etc. you ARE a true orthodox.
I call shenanigans. Orthodox doctrine does NOT teach that if you do all these things you are a true Orthodox. Orthodox doctrine teaches that if you truly repent in your heart, and continually live in repentance, you are a true Orthodox. Certain Orthodox saints purposefully violated the Church's fasting practices to make just that point.
And let's clarify:
Baptism: yes, you must be immersed
Confession: post-baptism, yes, you will go to confession, how and and when however will differ with each person depending upon the guidance of their priest/pastor
7 rites: I have no clue what you're talking about here (seven Mysteries or sacraments? if so, no Orthodox can do all of them because they don't all apply to everyone)
Bible interpretation of the Church Fathers: actually, it's the interpretation of the Church that must be accepted, not the Fathers per se
So in case of orthodoxy they have to say all this large number of orthodox ARE indeed saved; thus, they would be forced to come up with some other answer about the word ''few'' in that verse.
No, we don't. Because Jesus isn't talking about mathematical percentages. You're making a category mistake.