Oh of course! More data (sanely applied) is almost always going to result in more accuracy. I just found it very strange that the core assumption of the article

Oh of course! More data (sanely applied) is almost always going to result in more accuracy. I just found it very strange that the core assumption of the article -- that the default setting is to add median times of subtasks -- was never questioned. Why was that the chosen method to begin with? Most time estimating tools (Pivotal Tracker, etc.) work with averages, not medians, for precisely this reason.