Especially when the difficulty has increased -which went up approximately 11% from 10076292 to 11187257 about 4 days ago...

[EDIT] and now we had a six hour round, the shares will take some time to calculate - queue the large quantity of posts from some people about round calculations showing 'none', then a few posts later 'it seems to have corrected', then a few posts later 'yeah but there must be something wrong', then a few posts later 'where is slush', etc, etc, etc...