Oh, yes, Lance would! You need to incorporate 2-3 "too easy" days if your other days are hard. It's those easy days when the increased strength/conditioning gets built up to compensate for the "damage" from the hard days. That's how you improve whether in cycling, running, or weightlifting - cycles of overstress/damage and rebuilding stronger than before. If you don't take the easy days, the "damage" never gets rebuilt and you run a chronic deficit, ie, overtrained.
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If it ain't broke, mess with it anyway!