One Chinese learning resource 僑委會中文教材 and Chinese AP test

A friend pointed this out as a Chinese study resource: 僑委會中文教材

http://media.huayuworld.org/interact/ebook/default/.  I don't think all the links on the web page work but most seem to.

Check out Chinese AP oriented readings on the higher level section.

http://media.huayuworld.org/interact/ebook/default/hard.html

I think the materials there are probably harder than the actual AP Chinese Cultural and Language Exam.  http://apcentral.collegeboard.com/apc/public/courses/teachers_corner/37221.html

For what I can tell, AP materials from 僑委會中文教材 are probably more like 5-6th grade level in Taiwan.  I looked over the AP materials from College Board and it seems to be more like 4-5th grade material.  I read somewhere that getting a 5 on the Chinese AP test is like two years of college Chinese classes in the US.  Does anyone know if that's true or not?