I just received my first royalties check from Taylor and Francis for our March 2011 book! I was expecting $74.48 as per the accounting received earlier. But, that was before the money crossed the border. The check in US dollars is for $119.17. Since there are 3 authors we made almost $360 in 2011.
I can't speak for Tim and Ju-Chin, but I've exceeded my own expectations. My only conclusion from this excercise is that if you want to make real money, you need to write more books (I refuse to believe that quality or tastes and preferences has anything to do with it).