I had considered dabbling in cycling and I asked sirpoc himself what his weeks were like. Whilst there was some overload and sometimes doubling if time allowed, for the most part he basically did what you described. Down weeks are a thing of the past in cycling, gone are the days where you might have half the winter off. They are absolutely stacking load upon load all year round now, as you suggest.
As much as I enjoy the chat in this thread and the science, I can't help but think we are trying to over complicate things. For a hobby guy in either sport, sirpoc has got to the top fraction of a %. Probably even more so actually in running, if you consider he's 41 and probably going to run sub 15 soon. I guess maybe a dozen guys in the whole of the UK might do that this year in that age group? I would probably bet, he trains the least amount of hours to get there. Maybe I'm wrong, but I can't imagine it's much more than that number of runners.
The main takeaway though is how disciplined this mo for is and consistent. Being able to do the same thing, week in, week out stick to the basics and fundamentals of what you are doing and look at the results? Of course if you wanted to dial in performance more he could add some specificity. But does it matter? I'd rather be an all round distance hobby jogger hero rather than dialing in just to get another 5 seconds in a 5k.
You have to remember what nobody is saying here: this isn't the greatest training method in the history of endurance sports. But, for a large percentage of people it's likely the smartest and safest way to get to the best of your ability, for the majority who find themselves time crunched. It's probably not even up for debate, at this point.
I've said before, put me firmly from skeptical, into unsure, into full bought in. It's totally changed how I think about the sport and endurance in general and what actually makes you good.