That flow math is done each month using a moving average, both annual and three months. It's a very accurate snapshot of where things stand, assuming no change to the flow rate. Banking on the flow increasing soon, as is rumored, is counting your chickens before they hatch. It's also a disservice to someone that is trying to make a comparison between job offers.
Anticipating that the flow will increase is similar to anticipating that wage increase are coming. Until it's been signed and applied, don't go spending that extra money.