Regardless of the nature of addiction in his specific case, I can assure you there are people who don't get the rush from coffee (even without prior exposure, that can possibly increase your level of tolerance).
Me for example, I feel very sleepy after drinking coffee. This was against my expectation and I blogged about it the second time it happened to me: http://0x40.blogspot.com/2007/08/wheres-that-forward-biased-...
I was born in India and my family does not drink coffee, hence I was never exposed to it during my childhood, except now and then, at parties.
It was only at work that I tried it out regularly and because of the way it affected me, I had to give it up.
I even joke that a few cups of coffee would probably help me go to sleep (but I have never tried it out in practice yet)
It has been 4 years since I blogged about it and I would probably have drunk less than 5 cups since then, with none in the last year, so addiction is out of the question.
Sugar works very well to wake me up, but I have to look out for and handle the subsequent crash later.
On an (un)related note, I also have tremendous tolerance to alcohol. I found this out a decade ago when I could legally drink and would experiment with various spirits and liqueur. Since budget was limited, each of us in a group has a limited number of shots, and I used to feel awkward when my friends used to talk about "that dizzy feeling" and I did not experience any. It was only later that I found out what was going on.
This also means my options to reach the "state of bliss" is limited, and the cheapest way for me to reach that state is meditation.
I am not sure if both symptoms are related, but someone who follows this more closely can perhaps comment.