I do wonder, though - how long have you been doing it, now?
I'm on day 3 of the process, starting from Siesta (and saw a decent gain from that), then E2n for the second day to see if I can ratchet it up a bit (started noticing a great change in how much more energetic I got), and it was a rather seamless transition, and today, I'm going through the E3n model, and I already feel it having an astounding effect on me (blazed through plenty of work without the 'morning' feeling), physiologically and psychologically. I'm still lazy, but at least I'm actively lazy, not lethargic and passively lazy (which results in being rather idle, and wanting to sleep more) like I've been for weeks.
I was actually feeling the urge to take a morning walk and watch the sunrise this morning. It's actually working quite well so far, and not often would I recommend something like this, but if you want more time to get stuff done, at least try it out (take your time to warm up to it). I mean, in some of the 20-minute nap sessions, and maybe a reason for some net-gain of energy, I have been out for longer than the recommended time; but despite that, I've been able to stick to the schedule, and been reducing my sleeping and nap times naturally as I follow the process (which I would take as a sign of it working well). The fact that the darkish rings under my eyes are actually disappearing is a really good sign that it's working, especially at times where it would normally be most visible.
I like to see this as setting your bedtime, and offsetting your naps by 6 hours. I miss a nap, I fall back to the previous stage and suffer minimal loss. And keeping track of when the times are is very simple, following that model. So let's say I sleep at 2AM; well, I can go the 8-2-8-2 model (8am nap, 2pm nap, 8pm nap, 2am sleep).