Actually...since we are on the subject again...I have been doing disarm counters lately. The reason is that I have been getting quite a few students from other arnis schools lately who have been interested in learning how to defend against them.
Plus...I have found that I now teach counters synonomusly with the disarms because it helps my students to better understand the context of the disarm.
What I mean by "context" is that not every disarm will be effective with every opponent or circumstance...so by understanding 2 or 3 ways you COULD be countered, you understand when the disarm may be appropriate and when it wouldn't be.
For instance...#1 is a sweet disarm against any opponent. If done correctly, it is quick, and even an experienced stick player could fall for it. Plus, it is easy to abort the technique if the experienced player catches on.
#3, however, is not so good against an experienced stick player. Not only can it be countered in many ways, but the person attempting the #3 is pretty well commited into the technique, making it difficult to abort the technique, or 'counter the counter.' However, #3 is still great to learn. Not only would it work against the average stick player, but it is a great technique modified w/ empty hand vs. stick, or empthand/stick vs. another heavier weapon (club, longer stick, shovel, etc.).
I guess I am saying that disarms all have there place, and understanding where each one "fits" can be discovered well from learning how they can be countered.