The PTS estimated difficulty is continue decreasing those days, the latest difficult is:
Estimated difficulty: 0.01256943 (83.81%)
With so many GPU miners released those days, I had thought the difficulty should increase much after that, but seems that not happen.
Dose that even mean the added GPU powers cannot catch up the lost of CPU powers? That's seems not a good news...
1. the new introduced GPU miners don't have superior performance vs. CPU miners. It just works more efficient and provides miners more options to mine PTS. Normally you have only 1 CPU in one computer but now you can have at least 1 GPU more to mine PTS.
2. some big boy miners still don't know about the new PTS-GPU miners. I did see a miner in 1gh pool with over 200k cpm, but some big boys in China could get over 1mil cpm alone with their AMD farm. Even if they know about it, they still consider about the profit of mining PTS vs. mining altcoins. There was no accurate PTS mining calculator available, so they still test it first before moving their big farm to PTS.
I don't think it will change drastic the total hashrates in such a short time. The GPU miners are just available for a few days. So why don't you enjoy mining PTS while it's still in low difficulty? Next week maybe totally different, who know
PS: I expect big dumps from PTS in short time like altcoins soon.