I too am growing a purple kush plant at the moment. I got the seeds sent down from the bay and this shit is looking crazy. The plant grew like you stated above, fat leaves and perfectly symmetrical. So I am about half way through flowering and the shit is looking insanely potent. Even the fan leaves have crystals half way up the leaf. The only thing is the plant is super small. It really hasn't grown height wise much at all since I started flowering. The buds are fattening up though. This actually will work good for me in the future since I have a lot of space limitations in my little room. So I did take one clone that is off to a slow start but in general I feel this plant grows a little slower or not as vigerous as others. I will try to get some pics of it but camera doesn't do it justice.