I am a medieval staying around 500-600 medal range. I was just cleaned out by someone from gun-powder age, losing about 140K of food. I guess it was a retaliation for my raids on those juicy 100K+ gun-powder-aged bases. ;)
I am playing on an old ipad2. The game does lag occasionally. I make sure that I close other programs while I play. Since the update, only had one crash while attacking a suspicious looking base with plenty of loots.