The only incentive that will draw miners back is some green blocks.

Although it is ultimately down to luck there may be some tweaks such as difficulty setting that could affect the odds. I'm no expert but I think it may affect the pool's total results if we all picked the "Easy Mode" perk or alternatively if we all ticked the (non-existent) "hard-mode" perk. Maybe we should even stoop low enough to mine empty blocks to give the pool a few seconds head start over the others on each new block. At the moment I feel that odds are against us like playing roulette on a table that has a double-zero as well as the normal one. There may even be some mining rigs that are luckier than others, I wouldn't put it past the manufacturers to add a "withhold block if you're not using their pool" algorithm although I expect someone's checked through the code to ensure that's not true.

Sorry about the rant Doc but it can't be just bad luck for 3 months solid.