Thanks slmw! They wrote me back and said the test timer pauses while the pages reload, so if the test is sluggish it shouldn't impact you. Knowing that is helpful, maybe my son will be less distracted/frustrated knowing that next time.

He got the scores he needed, actually, to qualify for Advanced CTY for both verbal and math, so I suppose that's all we really needed to do anyway.

He still thinks he didn't do well and wants to retake it. I should have reminded him he has to hurry on the test... we did a sample test months ago in which he handled the time better but I'd really drilled it into his head beforehand.

For him speed based tests are always going to be a challenge, so he needs to do his best in his approach to time management.