The problem is that when people mine really hard really fast briefly and then leave it, the difficult is raised significantly to account for that miner. Once that miner leaves and the difficulty has been adjusted to account for their presence, it can take days to get the blockchain moving again at a steady pace because the remaining hashing power isn't enough to hash enough blocks over a short period of time to alter the difficulty to reflect the lack of the really powerful miner.
i've said it before, if the blockchain needs an increase or decrease in mining just PM me here or use the contact link at the bottom of my explorer.
i can control my hashrate and 'ease' the difficulty down or up as needed.
I can too, it just annoyed me that there were only a handful of people who knew about the pool and nobody would admit to it.
I eventually blocked that IP and called it a day. With the new pool it's all out in public.
-Dave