There are two times a year that the adjusters are swamped. November/December due to Christmas and March because lawyers have to pay taxes. Everyone wants to settle before Christmas, so they can spend more on the holidays. Taxes are due in April, so lawyers want to settle more cases to pay their taxes due in April.
So if an adjuster gets say an average of 25 cases to be settled a month, the number could double during those months. Also in November/December, adjusters like everyone else wants time off for vacation, holidays etc, so could limit the time they have to review their claims or have someone else try and pick up the slack. And as MSAD stated, it depends on the type of case, injuries etc that they review.
Some cases may have to go through several people for authority and that adds time, since until management reviews, then nothing can be done to make an offer or reject it. But you have one thing in your favor and that is that most companies want to close as many claims by the end of they year and they push the adjuster to do so. But that does not mean that the offer could come before Christmas, only that an offer could be made and the check does not come till after the 1st of the year, but then the case is closed and off the books.
Also, say the adjuster calls the lawyer on Wednesday, but they play phone tag back and forth, could be another week before they actually talk to each other. Then the lawyer calls back and once again, phone tag back and forth. Your lawyer will call you when they make an offer, since by law he is obligated to do so. good luck