One thing that occurs to me is that the new standard LX2 has a listed high lumen output similar to the ones Sean is seeing with the newer old model. How high has anyone seen an XR-E go as far as lumen output? Maybe Surefire just decided to overdrive the emitter a little, hence the reduction in runtime. Large companies have also been known to buy in bulk to save cost, and take ages to use up supply. Maybe Surefire bought up big 5 years ago, and just used up supply. Maybe the "new" emitters Surefire are using are ones that are three years old. Who knows.
Unfortunately there really needs to be more in the way of sampling done to verify that Sean's LX2 isn't just a freak of nature. And since the new LX2 Ultra is due for release this year, I doubt we will find many interested in purchasing a new current model just to find out.
I have been debating for over a year now whether to get this light or not; with the new LX2 ultra coming out soon my decision is now made even harder
I purchased my LX2 at a steal of a price of only $60.00 brand new