A couple comments
I haven't seen the original survey, but I get the impression it is not a choice between Use our devices at salary X or bring your own at salary X-Y. I suspect it is a case of, if you have two job offers, everything else being equal, would you take the one with a slightly lower salary if they allowed you to use your device and software of choice instead of having no choice and a slightly higher salary.
I got fed up, myself, when IT changed from a service organization to a dictatorship. Their job should be to help you use what you need to use to do your job, not forcing you to use whatever makes IT's life easier.
My last job, which I got in the days when MS-DOS was the standard, I specified that I would take it if I got a Mac. Eventually everyone got Macs, then some years later everyone was forcibly switched over to leased Windows machines. But, to my Boss's credit, he kept his word and continued to buy me Macs out of his department budget. Given that, I would have responded to the survey that, yes I would take a lower salary in order to use the computer of my choice.
Biting the hand that feeds IT
