One thing to note for the low mhash users, there was recently an increase in the bitcoin difficulty, thus causing a reduction in overall share value, and in terms of a pseudo-proportional scoring system like on slush's pool, that means your score will go down, and thus your reward.  I see some people talking about how things are "different" after the DDoS attack, but coincident to this attack, was the recent bump in difficultly, thus making a before/after comparison moot.