11 balls out of 12 with almost an exact amount of under-pressurization was not intentional? (or, at least, a mistake)
do you think it is a possibility that All the balls were inflated to the lower part of the allowed range and all had slight change in pressure (decrease) after sitting around in a different temp/environment as to where they were filled
(although i would think the cold would shrink the ball, thus increasing the internal pressure)
i would also think any ball that is being used (and held closely by big sweaty athletes) is gonna warm up and have a slight change in pressure...