I seriously doubt if those guys really did 100+ miles in the final week leading up to the biggest competition--but then again, they might have. The point is; I believe Rodgers, at his peak, was running somewhere upward of 170 miles a week and for him, 100 might be a "taper". With the Lydiard program, it is important to be "fresh and sharp" and you cannot be fresh and sharp of you are still training hard. For someone who trains upward of 100MPW regularly, it may not be a big deal to "jog" an hour in the morning with some light fast workouts in the PM in the final week. It may add up to 100, it may not. I don't think Arthur's original runners were, even with morning jog, go too close to 100 in the final week before the main competition.
In the final stage of track schedule (final 6 weeks or so), you might still train fairly hard so, including morning jog, it COULD get up to 70 or 80 or whatever; but it would all depend on the individual and the event you are training for. You may perform best with 20; or you may perform best with 90. In the end, it wouldn't matter how many mile you might run in the final weeks, would it?...or unless the weekly mileage is your final objective.