They say percentiles as to other CTY talent search participants, and yet they also say an X% is the percentile against text takers two years up (e.g., in 2nd they give the 4th grade SCAT). So, I leave that to someone else to answer.

You can pretty much tell the qualification and award levels from the above. I should have typed in the Q and H levels next to the list, but didn't think of it. Glad to help.