Yes but in the last month scrypt diff is not increased.

Sep 08 2014    28,124    1.17%    805,267 MH/s
Sep 05 2014    27,799    2.87%    795,979 MH/s
Sep 01 2014    27,024    -3.74%    773,787 MH/s
Aug 29 2014    28,073    -1.40%    803,825 MH/s
Aug 25 2014    28,472    1.21%    815,234 MH/s
Aug 22 2014    28,131    0.13%    805,473 MH/s
Aug 18 2014    28,094    -4.08%    804,414 MH/s
Aug 15 2014    29,290    4.73%    838,674 MH/s
Aug 11 2014    27,968    4.27%    800,815 MH/s

Nice!