Started with 2k de a 3pm yesterday. 5 hours later 40k de. Gold 3 is the best. My strategy is a bit time consuming in training. I use 20 giants and 14 wizs. Once I upgrade my giants to level 5 (I am town hall 8) I will be able to Loot a lot better.
Silver is risky. Sometimes loot's good, sometimes it's awful. You've just got lucky. It should dry up after a few days. (It's the after effects of the maintenances)