John made the second assessment today: number of cells per tray with no germination or very small/abnormal seedlings.
The average number per tray varied with crop, but this may not be significant:
The differences between the growing media were small, apart from No.3 which was much worse for lettuce and cabbage. No single medium is a clear winner over all three test crops, so far.
1,2,6 very close second
3 very close second
Click on the images of the trays to enlarge them and view as a slide show.