I honestly find it a bit contradictory. Too many "maybes" and reservations for someone who knows for sure
that this person is the tulku of his great teacher, Kyabje Kalu Rinpoche, but as he says, I'm not omniscient. There's no way to know since I can't read his mind.
Cone, he is in a tough spot, that's what it is and we all know how it goes when it comes to high tulkus. The story Rinpoche tells goes a long way to explain his "certainty":
Rinpoche: There was a teacher, very learned in the Dharma, who had no time to keep up with his practice. He never revealed this to his students. Because of their pure view and devotion for him they all realized the true nature of mind. After they were enlightened they could see their teacher as he was and they liberated him as well. Thus, pure view and devotion are very important.
This story doesn't come by chance and he didn't tell it for no reason. First he speaks about the qualities a lama should have. Then he tells us a story about a lama who hadn't them and even so lead his students to enlightenment. It is sort of a tranquilizer to those who find the Yangsi so different from his predecessor and may feel insecure. As I said, too many maybes.
By the way, I don't know Lodu Rinpoche, but his honesty touched me. Quite refreshing (not the usual when it comes to high tulkus) and I appreciated his interview a lot. This lama has balls. He is prudent and wise. We should have more like him, if you ask me.
I know some of the work of the late Kalu Rinpoche and after seeing Yangsi's site, I hope he is right and that the Yangsi can benefit as many beings as his predecessor, being the tulku of Kyabje Kalu Rinpoche. There's no way of knowing what will happen. I'm not omniscient and as far as I know, he may well be a Buddha.
I also liked that part where he says:
So one may choose to keep the image of the first Kalu Rinpoche in one's heart?
A:If they visualize Kalu Rinpoche with devotion and practice according to what Rinpoche taught, there is nothing better than that. In the Kagyu tradition, a renowned master said, “When you do not meet a teacher (in this life) for whom you have heartfelt trust, you can choose a great master, one who demonstrated, before he passed, the conduct and qualities of a bodhisattva.
Good advice and always useful at least for those who aren't omniscient and, with their "ordinary perception", "want him to be like his predecessor, displaying the same inner and outer attributes". Those were indeed the attributes of a great being. So it's natural that we more or less expect his tulku to show them.