That's an interesting concept. Perhaps there is some sort of pool bug that is providing some miners with duplicate or useless work and counting shares that should not be counted? I do trust eleuthria and think he is an honest pool operator, but people are human and humans make mistakes.
Did the bad luck start around the time of all the backend pool changes and rollout of scrypt guild?
We're all just speculating here, and the only one that can really look into this and know for sure is eleuthria.
I prefer the more tinfoil hat theory of someone spending $1MM to make a chip and boards and like everyone who made ASICs, they have a few flaws. They work great on the test set, and maybe even worked great for a while on real work, but because of some screwup they just never return solutions for work higher than difficulty xxxx (insert your own paranoid number here). At some point the people that made these miners figured it out and thought (oh shit, we are solo mining and our best share is NEVER above 3,000,000,000, but we have invested all this money). What do they do? They would have to point the miners at pools right? And they could not point them at small pools because they might get noticed. So, they make accounts at the largest pools and produce a ton of work (but never above a certain difficulty because of the flaw in their miner) and get a proportionate share of the blocks mined.
Is that just too crazy? Maybe. I know most people would assume those people would just stop mining and write off their investment right?