Hey Dev, difficulty is still screwed by 1 block retarget..
Yes, blocks have been taking a bit long to get solved. piCoin is meant to be mined out over a longer period of time than a lot of new alt coins these days, but we do understand the the current block rate can be too slow at times. We're going to evaluate it over the next several hours and if necessary we will come out with an update. The difficulty has been pretty steady at 50 for the past 30 blocks though so it's very possible that no updates will be necessary. Except for blocks 780-783 blocks have been solved at a solid pace.
I'm not a math genius, but you told us block time target is 314 seconds.
Would you kindly tell me average blockfind time of last 20-30 blocks?
You need to get the network time to settle. It's only been a few hours since the difficulty spike due to a heavy amount of miners jumping on the network.