Same here. The last 5 days have been very consistent but today is down about 1/3

Too many evil 2+ hour block sucking out all our luck
slush's pool is in the same boat we are in. about the same speed and an awful lot of 2+ hour blocks
sprinkled in there.
deepbit on the other hand has been seeing very consistent results... very few 1+ hour blocks for
them in the last 24 hours.
we had a good last 5 days and now we are paying for it.