My earnings and impressions are about 25% of normal for both yesterday and today... today I have more sessions than I do adsense impressions (and each session has a average of 20 pageviews, each with at least 1, if not 2 adsense ads)....
I used to look more frequently, but these days I try not to look more than once a day and all looks OK to me - last two days were actually up which is surprising since there is somewhat a pattern of lower traffic on weekend.