H1-B workers can only be paid at or above prevailing wages in the area per Department of Labor stats. This is set in the law as to avoid displacing US workers.
If you classify someone as a "Web Developer" then they will fall in bracket that is ~55% of the "Computer Programmer" bracket (this data is by County so it varies a lot by geography).
AL programmers are paid from 61k to 95k. SF programmers are basically 20+k higher.
Cool. Thanks for the explanation!