Last 50 Pow block
>> nHeight = 81645, nPoWHeight = 18974
>> nHeight = 81638, nPoWHeight = 18973
..............
..............
>> nHeight = 81020, nPoWHeight = 18924
>> nHeight = 81024, nPoWHeight = 18925
From Height 81024 to 81645
Check the Block explorer
81024 Block timestamp @ 2014-06-19 22:39:43
81645 Block timestamp @ 2014-06-20 01:46:05
so 50 pow block take about 186 minutes,
So the last 50 block average time is: 186/50=3.72 minutes.
The reason why average pow block time more than 90 seconds?
Because sometime when multipool leaves, the difficulty is still high, the difficulty will change in next block through DGW difficulty adjust algorithm,so the block time may more longer than 1.5 minutes, but it's do not have much influence on supercoin speed, because we have a parallel POS Mechanism, and the POS Block is Super Fast, so you can still transfer coin at a very fast speed! 6 confirmation less than 2 minutes, while bitcoin 6 confirmation take 60 minutes.
so we only need about another 200 block, first halve will happen.
it will be soon.
Dev, Is the calculation right?
"Because sometime when multipool leaves, the difficulty is still high, the difficulty will change in next block through DGW difficulty adjust algorithm,so the block time may more longer than 1.5 minutes,"
Yes that's right.
