Not quite the "average", but the 'median'. This means that half of those polled used less than three months, and roughly half used them MORE than three months.
So all of the ecig users chronically puffing nicotine AFTER three months comprise at least 50% of the polling pool.
it is a bit of a stretch to assume those that continue using their ecig after 3 months are irrevocably attached to their ecigs. I still use mine, but with zero nicotine. Others may find this odd, but I'm quite content with that.

I am not one that espouses ecig+nic use eternally, but I am of the mind that individuals should be able to make this decision for themselves. I am confident that after the smoke is removed from their lives this decision will be much easier to make.
Eventually is a wonderful adverb!

The junkie thinking you are referring to.... I am also fine with that, as I personally am a caffiene junkie, and certainly do have junkie thinking with regard to my coffee. Again, we agree to disagree here.

I see no point in placing absolutes on this process, as it serves to shut out the individuals that are really stuck on smoking, and can see no other way out.
I have to admit, I find your energy most refreshing. Keep fighting the good fight, and together we'll get more folks to stop smoking!
