People who say botnets ruin CPU coins are idiots. Just like with any coin botnets are an issue. Bitcoin has them, litecoin has them. What makes people think that botnets can't use GPU's just as much as they can use CPU's?
This is either an obvious troll or someone very new to the scene. Either way, I don't have the time to walk you through initial difficulty jumps. There's a big difference mathematically between botnets on an initial launch vs established coins such as Bitcoin/Litecoin.