I think the real point is that they did a bona-fide tradeoff analysis and found that for their use case one algorithm was better than another. It's not about ho

I think the real point is that they did a bona-fide tradeoff analysis and found that for their use case one algorithm was better than another. It's not about how fancy the algorithm is, that's just how great engineering works. It's only surprising if you don't consider "brute force" to be just as valid a tool as any other.