The published timelines for fasting are ballpark figures cause many things will affect at what point an individual has expelled most of the causative agents and their system starts the cell regeneration and actual healing process. The general published guidelines is 2 weeks. From what I've read a some from personal experience it appears that the different cleansing cycles are 7 days +/- and of course there are not going to be any hard demarcation points when the system has shifted cleansing modes.
In my own personal experience it is around the 2 week mark that I start noticing brain activity becoming quieter and more introspective. From that and the published fasting timelines I've come to equate it with the shift in the cleansing cycle. This is an intuitive process for me. The fact that I also see the cleanses as a great opportunity for self observation and having been involved with teachings thatvalue that puts me in a interesting position to observe any shifts in consciousness. What their specific meanings I could not say but a shift nonetheless.