I read your links. Even they suggest that it is only addictive for some people (and based on my experience, not most users).
Your links liken it to alcohol, which is of course NOT addictive to the vast majority of people who use it, but which IS addictive to a relatively small number of people.
There are people who are sex addicts too, and who seek treatment for it. But most people are not sex addicts. So I continue to maintain that marijuana is NOT generally addictive, even though I acknowledge that it can be for some people.
Your link cites 150,000 people who seek help for marijuana addiction each year. But given that the number of Americans who have (or occasionally) smoke pot has to be in the tens of millions, I would argue that 150,000 is a pretty small number -- especially compared to the 7.9 million Americans who are addicted to alcohol.
The FreeRepublic search capability can be a wonderful thing.