Good trick, but maybe next time, pad it with filler text so it says “22 min read” instead of “1 min read”.
Crime dramas have the same problem. Obviously the prime suspect at the halfway mark is not going to be guilty. Novels, too. Every suspenseful novel should be 1000 pages long, even if a lot of the pages are blank, so that the thrilling ending has a chance to sneak up on you.
Anyway, this is clearly an underexplored topic. I’ll do a full post on it later. (Or will I?) In any case, thank you for bringing this issue to our attention.