5 days - 0 blocks
6 days - 1 block
7 days - 2 blocks
13 days - 3 blocks
17 days - 5 blocks
lots and lots more blocks ...
Oh well, lets hope we get more much closer to the expected time soon.
With your current round, the probability of finding exactly 0 blocks in 7 days at 1.08PH is: 2.24%... based on Bitcoin's poisson distribution... it's not very probable to get the big swings your pool is having.. it's very unlikely... you sure you didn't screw anything up?
Theres 13 hours round going on at ghash, with 50x hash power, 558266855266 shares so far - it can and will take some time sometimes.