try to find block now using you gpuminer, i am curious how long time you should wait...

That is hardly my point. The dev released a close sourced CPUminer and released the source after a day. It was relatively easy to find blocks with GPUminer after a day. So he had a day mining with his GPU at high block rewards while verybody else mined with CPUs.
Which means the dev lied and hoarded a lot of coins waiting to dump. All you guys doing are helping a liar and a cheater profit.