As a general note, test developers usually do pay attention to how scores change depending on how ceiling rules are applied, while piloting and standardizing tests. The idea is the ceiling rules won't significantly change the raw scores compared to administering every item available, but -will- minimize fatigue and frustration from plowing through excessive numbers of too-hard/incorrect items. Of course, the behavior of outliers won't necessarily be included in the final decision rules, since they are by definition a very tiny contributor to the data set.
You can see some of the data on increases in mean subtest/index scores on the extended norms in the tables from the WISC-IV ExNorms supplement:
https://images.pearsonclinical.com/images/assets/WISC-IV/WISCIV_TechReport_7.pdfQualitative observation data may exist, but I doubt it was consistent enough to code without prospectively training the examiners.
