Just to expand on that a bit:
Last adjustment was block 360865, 2015-06-14 04:56:03
Latest block was block 362808, 2015-06-27 19:51:48
That's 1944 blocks in 1176945 seconds.
That leaves 72 blocks.
If the difficulty is supposed to go down 16%, then instead of 1209600 seconds (2 weeks), it would have to take
1403136[/url] seconds. As 1176945 seconds have passed in blocks already, the remaining 72 blocks would have to be spread out over 226191 seconds, or simplistically put: 3141 seconds - 52 minutes and change - per block.
As I end this post, 3 more blocks were found in a 5 minute timespan; more luck than trend but it does tend to affect things;
Estimated Next Difficulty: 49,463,795,208 (-0.46%)
While bitcoinwisdom is just a simplistic approach to estimation, I don't think there's much merit to whatever alloscomp is using; perhaps incorrect input data.