Since there really isn't an IQ threshold that could have been chosen that would not be controversial, what would you have done?

I would have reported the IQ difference (and possibly some of the figures in this comment, which if you prefer you can also calculate for 132) rather than a dubious measure of distance to the 132 threshold.

In hindsight I regret objecting to the cutoff since my main source of dismay is the second point in my previous comment.