The problem is, and this has happened to me personally, is you'll be told the salary is "competitive" without further details even when pushed. Of course, everyone wants to save a buck, but when you've gone through multiple rounds of interviews...spending personal days...personal time doing projects.. then you get an offer that is 1/2 the starting range for the industry and location, you have a problem!
The two times I've had that response, I've just taken my current estimate of high salary, added $20,000 and then asked them to confirm that that amount is in their definition of competitive.
First time, they said no and we stopped talking. Second time got me my current job. YMMV.