That includes those fortune 500 companies (a couple of whom had internal recruiters bail when I mentioned my current salary + the COLA number). Cutting your real estate costs by $12-15k goes a long way but it doesn't magically cover $40k+ paycuts. It is good for employers (for instance, one guy was willing to disclose "I got two guys with Master degrees for $20k less than what you wanted.") but not so good for employees on the upper end of the pay scale. (i.e. above 6 figures outside of SF/NYC)
It is anecdotal, just my experience after looking to move there.