Your right about it just being about when you're ready to quit.
Those who're doing it cold turkey are doing it the hard way, I wish all power to them to quit.
I don't know where you got the stats from re. heroine quitting of Vietnam vets.
My info on that is that only about 10% can go cold turkey and stop first time unless they've got some support, friends, environment etc.
Some stop for a while but the addiction's still there so they use again until they're sick and have another go at cold turkey or go on a methadone programme.
Cold turkey ain't easy.
With nicotine withdrawal, cold turkey will work if the addict has enough will power AND has cleared the reasons for his addiction, in his head.
If he's done that, the physical addiction is just a blip and the rest is up to him.
If he really wants to be nicotine free, he will be.
There'll always be a thought, always a memory of that drug , that thing, that time, that incident that turned us on to the max in the past.
Realising it's just a memory now, just a thought, simply a flash back to a time when it did something for us, but now it's stuffing it up for us, is the key to letting go of the deal.
Cold turkey's for some, it's their way, but not for others.
All things can become an addiction, even love.
Sometimes we just have to learn to let it all go.
As an artist and painter, I know that there's no book of rules for art.
An artist uses any trick in the book, anything at all, way beyond any book to paint that perfect piece.
The same with your life, your addiction, it's dealt to your way, so those who use any trick in the book and any not in the book to reach their goal and gets there is a success story,...in my book.
So all power to you brothers( and sisters) may success be yours.