The NCEES example problems are old test questions, so yes, they are representative of what to expect. I found that the 6-minute solutions book also helped immensely when I studied for my retest. I would also recommend going through all of your code books and having them tabbed for the basic sections (seismic, wind, snow, etc...)
I found that about 25% was directly from the code books this past test in the afternoon. Having done the 6 minute solutions permitted me to work through about 50% of the questions in no time flat and I worked on the other 25% until 15 minutes was called. I used that last 15 minutes to recheck what I could and ensure that all of the proper bubbles were filled in.
Good luck!