How about another one.. "Takes too long to get to the interesting parts." i.e. learning Obj-C and taking until the very last chapter to give even a cursory int

How about another one.. "Takes too long to get to the interesting parts." i.e. learning Obj-C and taking until the very last chapter to give even a cursory intro to apps. By the time they get there a ton of people will be burnt out / disinterested.