If a review is "pending", it means it hasn't been looked at yet for approval (or rejection). And this only happens when one or more of the mods are away on vacation or work or whatever else reason, which is what happened during the holiday break.
As such, there was a large backlog of pending reviews in the queue, but that has been cleared up now. Let us know if any issues, but no one should have pending anymore.
And to clarify, most reviews are approved (or rejected) within an hour or so (most work hours during weekdays), or a few hours or the next morning (reviews posted at night), within a day or two (reviews posted over the weekend). But there are times when mods are unavailable for a number of reasons (vacation, holiday, travel, family, etc.) that might cause a delay.
But rest assured, we'll get to it as soon as we can. We appreciate everyone's patience during times of high volume.