Ok, I have ended up retyping this basic information a number of times, so I'm going to create a new post that I can just link when it is the answer to peoples questions.
What is Jig Lag:
Jig lag can be explained by, any delay in providing a response to the server during the fishing mini-game.
What causes Jig Lag:
1 -Communication lag caused by your ISP
2 -Communication lag caused by general internet traffic
3 -Communication lag casued by the SE servers
4 -Slow player response due to distractions
How long do I have before Jig Lag takes effect:
As tested by MJV, ~10 seconds, this may be slightly longer for the first jig to start the minigame.
What are the results of Jig Lag:
Instant depletion of remainder bar
For someone familiar with the other 2 DoL classes, this can seem a lot like DoL Fatigue, but there is one key difference. Fatigue will damage the fish, and auto-fail from a single jig. Jig lag will auto-fail, but you will not recieve a damage fish message from that same jig. (Note: If your lag is not completely debilitating, you can damage a fish on one jig, then fail to jig lag on the other actions. This is different then the fatigue damaged fish message from the same jig action)
So that is the basic information.
Jig lag can be VERY frustrating, and depending on your ISP/SE Server can be very uncommon, or a regular/daily occurance. Unfortunately, only cause #4 can be resolved immediately. All other causes are outside your immediate control.
So, if you are having fishing troubles consider this as the possible cause.
Edited, Feb 14th 2011 10:26am by Purplenv