Yes, the nicotine salts are what replicates the fast hit you get with cigarettes. It's what makes Juul a more effective smoking cessation device over a slower hit you get with chewing tobacco, nicotine gum or patches.

I've quit smoking for a year now, but under pressure, Juul has stopped making my preferred flavor; the flavor that actually got me to quit smoking. I've tried other flavors and other devices but they don't give me the same satisfaction. I'm afraid I'm going to go back to smoking when my remaining 3 packs of cartridges run out in a week or so.

This Juul hysteria is almost certainly going to raise smoking rates in the population. The UK government still stands on its claim that vaping is 95% healthier than smoking.

https://www.theguardian.com/society/2018/dec/28/vaping-is-95...