Strange, I live in Southern Brooklyn (Marine Park) and I've noticed nothing out of the ordinary. I make up roughly 45 gallons of RODI a week and both production and filter lifespan has been the same as it has for the last year or so. We are all using the same feed water, perhaps it something much more local or as was mentioned something with the brand of filter being used.
I'm using the BRS and I get about 50 PSI to the membrane. My feed water is usually around 9 TDS and is 0 on the output. This has been true for more than the last decade. You city guys might be getting water through some really nasty pipes which could be causing some of your issues.