I'm sorry, but there's no 'unsexy data crunching' here - just a series of ratios compared against one another. There is a whole body of statistical literature about how to do anything of this kind, and they haven't done any of it. I'd quite happily believe that none of these differences have any kind of significance in the statistical sense (i.e., it's due to background variation). But then again, I wasn't given any information to know whether they've even looked. So I can't say...