I think the “hand of god” and “divine move” labels arose from the widespread and immediate reaction that genuinely believed that the move was effective. Gu Li 9p (providing the Chinese commentary) may been the most influential source for that phrase, since he is reported to have made such an exclamation upon seeing that move. Of course, the popular media is going to firmly latch onto such language, regardless of later analysis/refutations.
It certainly surprised a lot of people and the vast majority did not know about the refutation until later careful analysis. If we want to think of it as a trick play, then it must be the one of most famous trick plays of all time. Regardless, I think it is still fair to say that it was brilliant and arguably one of the most famous and carefully scrutinized moves of Lee Sedol’s career and of recent history.