Bandwidth
DHT, especially for popular torrents, can have quite a high bandwidth overhead IIRC.
cant descried if its a good or bad thing this... If your subjected to non port 80/993/143 etc bandwidth limitations by your ISP, then this could slow things massively.
Still waiting to see how long it takes for the Games Factory to go tits up when they realise there's no way in hell they are going to make money, but I'm guessing the move to DHT might have something to do with covering their asses.