Yeah, I have some that take about 45mins to an hour. Usually if they go over an hour then they stop, I'll step in.
They do do strange things sometimes! I had one that fully zipped but the membrane was sorta intact in certain places so it fully zipped all the way around again!
I has one just this last hatch that went all the way around and about half way around again, then finally pushed out! Odd...
The quail, on the other hand, would go about 3 quarters of the way, then break the shell the rest of the way by just pushing on out!