Ron, in the blogging world, disclosing the monthly traffic and income is not anything new. It was started by John Chow the leading MMO blogger. As for the western world, I have travelled/worked in a few countries (including US, parts of Europe) and it's mostly the westerners who initiate the most personal discussions :)
I'm skeptical of anyone who discloses the amount of money he makes on his blog. From my experience, those who revel in this exercise of telling others how they made six figure incomes on one month only want to attract people to their website somehow. Another interesting thing fact is that most of these guys want to dispell off their money making secrets through medium such as ebooks that they then pursue the unwary to buy through cheesy promotional offers.
Besides, John Chow sounds as obscure to me as Saint Nazarius. There's not any peer reviewed background information on him on Wikipedia. Besides, you would think that if he's such a prominent blogger, he would know how to properly write a blog. Boy, his website is an eyesore for a reader! Just a whole lot of ads all over the place.
Westerners are friendly people, but they do not initiate questions on your personal income, salary, property etc. That's a no-no, not professional at all. In my experience, we Indians tend to this behavior more. Not sure why.