Usually I would send PM to the owner of delegate that is not performing at its best.
However in this case I have no idea who is the owner. Both of these delegates are consistently signing blocks before their time-slot.
504025 2014-09-16T21:49:00 delegated-proof-of-steak 0 166 0.00000 BTSX -6 0.000933
504035 2014-09-16T21:50:40 delegate.nathanhourt.com 0 166 0.00000 BTSX -6 0.002048
PS: A possible solution for this would be installing ntpd.