More than 1,000 responses from 58 countries were submitted, and it produced some surprising results. Highlights, Moll states, included the highest annual compensation being reported as being $950,000 for a mid-level developer in Palo Alto, California, compared to the lowest, which was $200 for a self-employed freelancer in Tunisia. However, there are doubts as to whether an extra 0 was input mistakenly on the highest entry.
Moll also commented that "median figures were lower than AIGA's. However, keep in mind that AIGA is comprised primarily of members in the United States, whereas the DN survey included responses from 58 countries."
Full results of the survey, along with additional commentary can be found in this Google document.