I agree with the other posts here. Jake gave you a valuable insider's point of view. I'm curious--one to two months late on a total anticipated build-time of what? Six months? One year? Two years? As Mgaisbacher points out, even a one month miss on a three-month estimated total is not out of the question. Did a luthier really give you a "date when the instrument will be finished" or did he/she give you an estimate?
Famous last words: And with that- Im gone. You will probably read in the paper soon about a deranged kid who burns his bass in front of a luthier.