My experience has been: I don't get caffeine widthdrawals.
So I may be atypical, but I have found (largely) going without coffee no big thing. I'll have the odd cup to be sociable, and I do abuse it on weekends, but I also abuse No Doze on occasion.

Not that I want to argue with the medically-types who might have done the research, but I find the claims a little far-fetched, at least insofar as people might actually notice the symptoms.