Yes, there are individual differences, but there are more similarities. I think I have a high pain tolerance. In general though, thin, delicate skin is going to be more sensitive so the article got it backwards. Anyone with a lot of tattoos experience would know that. I just pointed out two things. If I went through the entire article, I could have found 15-20. They also said that many people are allergic to red ink. People saying this is one of my pet peeves. Having a reaction is not the same thing as having an allergy. Some people have a harder time healing red ink, but actual documented ink allergies are extremely rare. Some newbie's tattoo itches and they think they have an allergy.
I see this more and more often on the internet - people writing articles about something that they have absolutely no first hand knowledge about. What am I going to learn about tattoos from someone who doesn't know anything about tattoos? If you don't know anything, you have no basis for judging your background material.