You're dealing with a government agency and bureuacrats so expect the red tape.
Seriously speaking, most State board has a process where the board members will need to certify the results and vote before they grant you the license. From the NCEES transmitting the results to State (results has to go thru each State - don't ask me why) then the state workers handling each applicant's paperwork before they get presented to the board members. There's some lag time involved. And if your State board only meets quarterly and not monthly, that is additional delay.
Even though the basic scoring can be done rather quickly, there are several other processes that the results go through before they are put out. I believe they go through at least two statistical gyrations before the final minimum passing score for THAT test is determined. Further, cheating has to be checked and potentially unclear or improper questions have to be validated.
All of which could probably be done in a couple of weeks...the real answer is probably the one given by RacingAZ!
Engineerboards has a spreadsheet showing the historic announcement of results for various states starting from 2005. It is a good indicator of when you can expect your results.
They can't give you your score immediately because
A) They don't know what the cutoff for passing is until after they look at everyone's scores, and
B) They don't know if some of the questions need to be thrown out or not.
And I bet (B) takes longer than even a couple of weeks, honestly.
Hydrology, Drainage Analysis, Flood Studies, and Complex Stormwater Litigation for Atlanta and the South East -
I agree with all above. Ron hit it on the head too, collusion analysis is done on the results, by several different independent firms who specialize in such things.
Or you can just assume:
California takes the longest, because hey we're california, and we just think we're that important.
I took the first iteration of the multiple choice test. I thought they should have scanned them as you went out the door and given you the raw score. That way you would have some idea of where you stand before the curve.