Excellent. A controlled experiment. I suppose if you have a firm pedal and straight braking, all is well.
I've been doing some further research on forums for models using this style caliper, and it seems to go both ways. I think more support ABC over BCA, but that may be more because of Haynes, Autobook, etc.
Taken literally, the narrative in the Blue book would support either, as long as C follows B. It is interesting that elsewhere in the Blue book, and Haynes for that matter, bolt tightening sequences are shown using numbers, so conceivably the ABC arrows were more to point out the three bleed screws rather than indicate order, assuming consistent editing.. Hard to say.