This will be my third year of using them, and the first time using miniature pots. The way I have used them has been different each of those three years. Using 3" or 4" pots you can probably water the seedlings without getting the pots to wet and they will last longer indoors. This year I am using miniature puts - about the same size as those in your photos. I watered them about every other day on average. They were soaked most of the time and when I went to pot them up they were falling apart.
I germinated the seeds in seed starter mix in the miniature pots and then, when my instinct told me it was time, I potted them up in potting mix. I did not keep track of the time that took but it was on the order of a month.
The key to using cow pots (or peat pots) is that the roots never have to be disturbed.
