I haven’t read any of LW’s debates on this, so I’m not sure why one would be interested in whether the relationship between demographics and intelligence in EAs is weaker than usual, or what that would imply about EA. Mainly, I’d like to know by what routes people with predicted-to-be-average intelligence and average educational backgrounds are coming to EA, so I hope age, years of education, and occupation will be included so that the option exists of using the estimation techniques referred to above.
Having said that—intelligence research is politically toxic, and I’d also worry that people could spread bad ideas about how to use IQ estimates (e.g., general bragging rights, or “the smartest EAs focus on X, so we should pay more attention to X”), so I wouldn’t argue for including anything related to IQ estimation in publicly-announced results.
You mentioned the separation of parents and offspring, but it’s worth including the effects on the economics of (non-crated) veal production into your considerations. Approximately, each dairy cow is productive for the last three of the five years it is kept alive, and is impregnated once per year to maintain an optimal lactation cycle. source
I’d hypothesize that the overall amount of suffering experienced per day by an adult animal would be less than the amount of suffering experienced by a calf that’s experiencing the stress of separation from its parent. Since they’re slaughtered while still in this state, there could be an even better case for veal calves having lives that are overwhelmingly negative.