I think it’s probably fine to assume that he did lose some time — I don’t recall anything to contradict it.

What they’re talking about is time dilation effects, which occur out to a certain radius even beyond the event horizon. e.g. they might apply to a planet orbiting a sufficiently large black hole.

In this case, Nolan seemed to be right next to the black hole, so what they’re saying is that he should have undergone some serious time dilation.

if two giant blue guys with the strength of the Hulk and the intelligence that surpasses the smartest scientists in the world would suddenly appear in our world, they would have millions of worshippers immediately.

Would they though? I doubt it.