I think what is being said here is that trying to focus on the positives of quitting rather than the discomfort, in fact down right misery, that some experience in the initial days of quitting does help reduce that withdrawal process.
If you are quitting cold turkey, nicotine is out of your body within 3 days. Does this mean you are back to completely normal on day 4 - no, not by a long shot. The thing that really takes a long time to adjust to is reprogramming your brain receptors to live without the constant stimulation from nicotine.Think about when you smoke. You now need to get used to doing something else during those times. This isn't physical withdrawal but it's mental readjustment. Entering this part of the quit can benefit greatly if you go into it with a positive attitude. I've beaten the physical withdrawal now I get to really enjoy the benefits of being smoke free. All I need to do is learn how to live my life as a non-smoker again. This period of adjustment does happen but it takes a while. That's why we recommend making a full 1 year pledge. This way, you get to stay with us for a full year while you adjust to different smoking triggers in each of 4 seasons.
It does work for those who stick with it. Once you are over the physical withdrawal and are a little way into adjusting your life style, you will see that it's very manageable. Being aware of your attitude as you progress and keeping it as positive as possible will be a help to you in your quit.