That is correct. I tried to explain that in the original post as follows:
“That means only part of the Jigsaw work is in this release and the two prior Zulu 9 pre-release builds.”
Jigsaw source has its own parallel branch. The OpenJDK 9 team plans to merge the main body of the Jigsaw project into the main Dev source branch this month. Once we pickup that change, then Zulu 9 will contain all the Jigsaw work. I believe the Pre 1, 2, and 3 builds only contain some preliminary Jigsaw changes now, but not the comprehensive change for modularity.