What Happens When You Quit Smoking? Nicotine Tolerance

This is a page from About.com's Smoking Cessation guide and includes a short video about what happens when you stop smoking... or at least according to them. It says that repeated exposure to nicotine results in tolerance to the drug. Except that this isn't true. Nicotine is the opposite of drugs such as cocaine and, as every smoker knows, it only takes one puff to get high. What develops is a nicotine sensitivity - not tolerance - and the withdrawal symptoms are due to the brain's pleasure circuits screaming for another hit. Just a little will do, but as nicotine's half-life in the body is about 2 hours this means a little but fairly often.

I just wish About.com would correct the error but figure the video would be a pain to edit.