Do the numbers lakesideed cites (from chronicle.com) reflect accurate RD salaries abroad?
No, not those I am familiar with but it varies widely depending on on the country where a program is located and the size of the program as well as the size of the US institution sponsoring the program. A six figure salary would be a rare one, probably only at a program with hundreds of US students and as the director of a center with many programs as the OP mentioned. Many study abroad programs cater to groups of 30 - 80 students and could not afford such a salary and most I know of are in the range that the OP mentions as average. Most schools I am familiar with would attempt to pay on the low end of the scale of salaries for a comparable position within that country so many would pay much less than the range that lakesideed mentioned.