That's the point, I dont think, in my search example, a full stack developer with an MS and 5 years experience is going to be making ~90-127k 25th-75th percentile. Sounds like he'd be getting ripped off.
Any expectations of accuracy better than 10-15% are unrealistic.
In many markets 100K+ is quite nice for an MS-degree'd 20-something with a few years of experience.