Actually regarding the "Rule of 3" it's about as good of a place to start on Day 1 as anything else. There are obviously flaws with it, but it's better than a randomized "I'm saying one of the first three alphabetically listed is a sorcerer." That is a truly random grouping. Where saying one of the first three posters might be a sorcerer assumes an anxious "I want to get things started and appearing active" sorcerer in the bunch.
As far as with what there is on most Day 1s, it's a good starting point for seeing how first posters react to a "rule of three" suspicion.
Oh hi, I'm here.
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Fenris Penguin
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