Well then, I agree with you as well. I think if these 4 days were actually really hard then you're right, supercompensation might not occur (unless you're an athlete like Coe; I actually read once that he experimented with 10 days of hard training followed by 4 days easy; can anybody confirm this?). However, if the 4-5 days of "hard" training was equivalent in effort to what you would have been doing if you were doing 3 weeks up/1 week down then, like I wrote above, you might absorb your training more effectively.
The schedule I mentioned a few posts ago under "same training better package" is in fact the same training that I've been doing on my "hard" days; now I'm just using the weekly rest approach as opposed to the monthly approach. I've done this before, but the last time I tried it I must admit that I did fall into the trap of training too hard on my higher volume days. The promise of a couple of easy days each week seduced me into thinking I could push a little harder than usual. I still raced well during that period but, nonetheless, I believe I overdid it a bit. I'm going to try to be more controlled this time around. Cheers,
JZ