I personally would still do 18x bodyweight calories per day, or close. Some people here have reported losing weight (presumably fat) even on that level of calories. I have been probably eating about 16x my bodyweight (though I have been shooting for 18, it is just hard with my schedule to fit in that much food every day) but still feel my bodyfat has dropped with at least a little increase in muscle.
Of course you also have to take into consideration I am only in my second month or so back to serious training after a couple years of spotty workouts since the last point where I was seriously dedicated. Some of this could be muscle memory/newbie gains.
So take it for what you will, but I would urge you to up your calories as much as you can. This diet is very difficult to gain fat on unless you go overboard on the carb-ups, and it seems to be difficult NOT to lose at least a little fat along the way, even when bulking. You want as much energy as you can get for your workouts though and on this diet that is going to come from fat.
