and if you claim 9.1 took a year and 9.2/9.3 will take longer you can prolong it even more!
but since 9.1 took 7 months and we have no clue if 9.2/9.3 will take longer than usual 5-6months and how long will the "drought" on end of expansion take, its about as acurate prediction as throwing a dart at a target blindly and saying next patch will be in THAT much months...