I looked for that too in the article and missed it, too. But then I thought it might not be that easy. I suspect there will be a lot of users with a single luck shot or two, ruining the statistics
I agree. The dataset has been around for a while now. Also, even though you can increase your chances a few percent by hitting the right time, the users are still the ones to decide.
I'd give up all my karma and ability to upvote if it meant that half the HN users with downvoting ability had it taken away. Especially the ones that downvote before replying.