The requirement for the frequent breaks was something in NBC, who needed one-minute ad breaks over the course of a half hour program. Posters have also reported sitcom reruns getting chopped up for the same purpose.
A contestant from later seasons posted here, and on a turn around he and his fellow contestants actually sat down, turned, so they couldn't view the puzzle's reflection in the sunbursts. Now, silly me just says the break in the studio was prolly about 5 seconds long and no turning around was ever done. Just me though.
-Jason