Great article! As you pointed out, your calculations are based on typing the entire title, which rarely happens. The "title prediction" capabilities are important and might also differ between the interfaces, but we probably don't have insight into that.

When I search for a title on either interface, I'm lazy and want to click the fewest letters possible. I perform a mental calculation to guess what I think will be the "most rare" word in the title I'm searching. (I'm probably the only person in my house who does this though...) For example "bomb" for Dr. Strangelove, as "strange" is more common in movie/show titles (I think). And "hallows" for the Harry Potter films, as I could use "potter" but then I'd have to click through at least 8 "Harry Potter" film matches. And the displayed results are based on more than just pure matches -- there is some prediction applied based on popularity and perhaps your known preferences.