Ok.. So I guess you have to take his word for it or do some real digging, lol. It sounds like they may be rooted. Clones need super high humidity so all of the humidity recommendation should be considered. Personally, I leave them in solo cups until roots are coming out of the bottom. I place that solo cup in a zip lock bag and put it in the corner of the tent. Since you transplanted already, Id cover the clone with an empty 2 liter bottle or water jug. Just cut it so that it fits right over the clone. Leave them like that for a while and you should be good. Rockwool will dry out super fast in soil. Especially if there's a fan blowing. If they are rootes, the rockwool isnt as important.. The roots would be passed rockwool and growing in the soil. But keeping the rockwool moist doesnt hurt anything