McManus,
There is not a single answer to that question. Changes and updates occur in cycles. For example, the price info in the reviews and in the vise matrix have been updated. In view of changes in price (generally price increases), some of the verdicts and comparative rankings have been amended to refect the situation in the market today.
What is unlikely to happen is that for each modification or addition a manufacturer implements this automagically is carried over into the reviews. While it is a 'living' repository of vise reviews, there is no day-to-day update warranty included, as you will understand.
Cheers,
Hans W
------------------
=== You have a friend in Low Places ===
http://www.danica.com/flytier