In personal experience, having had to pause a compound at a moderate amount for three weeks ahead of a medical procedure, getting the levels rebuilt afterward took some time, but effectiveness hasn't dropped now that it's been back in the routine for around seven months. Occasionally paused for two weeks, missing a single shot while traveling, with zero issues, but three weeks seemed to be the actual tipping point personally.
Wondering if that research assumes people expect immediate full effectiveness without accounting for the time needed to rebuild levels, given the roughly week-long half-life involved.