We tried growing lettuce seeds in compost 150527 and regular commercial compost. Right from the off you can see that out compost has a much coarser consistency, which is not ideal in seed compost
We then tried a timelapse view of some lettuce seeds growing, using a Raspberry Pi to shoot one image a day
This isn’t night and day, but I do feel the seeds grown in our compost are slightly less leggy than the commercial compost, but both are perfectly decent growing media.
Lettuce seeds are terribly small and fine, nothing can be said about the clustering or evenness,