As long as the reviewers have read and "signed off" on the GPT-generated drafts, this isn't fundamentally different from a president having a personal speechwriter. The reviewers are still responsible for ensuring the GPT-generated content accurately reflects their opinions of the paper, just as a president is vis-a-vis speechwriter-generated content.

Also, CS likely has a higher proportion of non-native English speakers compared to other fields. The increased frequency of certain tokens could be due to non-native speakers running their draft reviews through prompts like "Please edit this draft written by a non-native speaker, clean up infelicities and improve word choices where appropriate."