I didn't read that about hair self-cleaning, but I have washed my hair only every-other day for quite a few months now. When I used to wash it every day, I HAD to wash it every day, or it would be gross. After a week or so of every-other day, it looks even better on the second day. I was thinking of dropping to every third day; your post may have just given me the incentive to try it. Washing my hair in the winter is a pain because it is long and I have to dry it before going out or I get really cold. Saving $ on shampoo is also a good incentive.
If you self-experiment with this, I would be interested in hearing your results. I think the best way to go about it would be to gradually lenthen the number of days between washings.