Yeah I would say the textures are what's killing it. Low end hardware like a netbook has next to nothing as far as GPU power or memory. My netbook is the gateway ec1436, which has a way better cpu and gpu but it definitely chugs if I use any texture mods at all. I have a 128GB sandforce SSD so that helps, but it really comes down to the fact that these things have nothing as far as a GPU.