We measure it before we advise it.
Every agency gates a list on seniority, company size or depth of ICP. We tested eleven of those attributes across our own campaigns, stratified by campaign and by sequence step so that a single good month could not carry the result. Not one of them separated from noise.
So we removed the gates, and published the table that says our own advice had been wrong.
11 / 0list attributes tested, none predicted a reply