I did try this recipe with 2% milk on the last batch. It was a bit runnier than the batches I've made with whole milk; I tried adding some unflavored gelatin (without reading the instructions) and it didn't really work well. I think I'll try this again, but use powdered milk to thicken it up instead of the unflavored gelatin. (or I'll try using the gelatin correctly...)
I'll update again after my next batch, which may be awhile - soccer season just started and I'm crazy busy!