If nothing happens in certain months because editors are busy, and nothing happens in certain other months (e.g. August and December) because everyone's on vacation, when the heck does anything ever happen?Please don't confuse "nothing" with "nothing that affects you". I simply cannot tell you how much there is to do in every one of my days (and weekends) that is not (1) editing, (2) replying to authors and agents, or (3) reading new submissions.
Remember the kitchen full of slush that you kindly imagined for me a while back? This time, imagine that same kitchen, but where all the slush is, imagine paperwork that needs filling out, internal emails that need sending, sales materials that need building, flapcopy that needs writing, schedules, p&ls, etc, etc, etc. And now imagine a black-leather-and-stud-clad Managing Editor standing on top of those piles with a fiery whip.
We're getting stuff done, I swear. During those times of year when there are pressing distractions and time out of the office, we're getting a bit less done, and that means that projects that are not yet officially ours and thus have no schedule get shorter shrift. And you'd offer them shorter shrift too, if the person managing the schedules was going to flay you alive if you missed one more deadline.