Yes, I'm also surprised you could let it sit for 3 days after mixing and not end up with a jello. Mine began to set very quickly after I mixed it. The left overs I tried storing in a sealed jar but it set by the next day. Perhaps the speed it sets has to do with how much oxygen is mixed in? I frothed my mix up good with my drill and zip ties.
I shook the devil out of it and let it set for 3 days (shaking it occasionally).