Lets forget the standard problems with measuring happiness and comparing it between different populations. There are issues there, but lets pretend like thats an accepted, valid practice that distills real truth. We're also going to pretend that people are completely honest when they fill these surveys out. What about some of these examples they use?

The chocolate example: The conclusion completely ignores the utility of having had chocolate on each day before the end of the week. If the result, that the marginal utility of a piece of chocolate a week later was less for people who had a lot of chocolate in between, surprised you, you've forgotten what marginal utility is. Do I need to really mention what's wrong with this comparison? Do people only enjoy chocolate on the weekend?

The children with goldfish: Imagine you earned a salary in NY strip steak as part of an experiment. Would you consider that experiment useful in drawing conclusions about money and utility or happiness?

The money in an envelope example: I'm not going to say anything about this, because I said in my intro that I'm going to ignore self-reporting bias caused by confronting someone about whether they acted ethically or not. (hint: if someone trusts you to do something and you don't do it, you may be less happy than someone who did do it--especially it is consistent with social expectations).

I don't mean to dispute the point the article is making, but honestly, after seeing the substance, I'm less inclined to believe it than I was beforehand.