Some Further analysis and prediction
This is what happened: After the scandal of the last quarter of FY 2005, when no EB 3 visas were available, the state department realized they did not pay much attention to what went on with the employment categories, as they were all current for quite some time. It was really unfair that a lot of people with later PDs got their GC whereas people with earlier PDs were left behind. As a precationary messure, and to prevent such "injustices" from happening again, they decided to take the PDs WAY back. It appears that the state department doesn't really know how many people are in the line from each priority date. It's all based on estimates (According to the EB paragraph in the bulletin). So the way it works is after each time they publish a PD they wait and see what kind of demand they get. the October bulletin had 1/1/98 for EB3 india. They probably got like 2 applications (I'm just guessing), and figured - we were probably a little off on that... Let's move it forward. This happened through the February bulletin. They don't realize that most applications are from 2001 and forward, but they are very aware of the 4/30/01 245i deadline.
What will happen: India is likely to catch up with the rest of the world within the next two months, when the state department realizes that there is still not too much demand for visas, even with the recent progress. (Except Mexico). Now, say for example many people filed their labor in the last week of April, and many of these were recently cleared by the LC backlog center. Since these guys can't even file 485, there will still not be any demand for visa numbers. So there will be some forward progress.
So my prediction for the March bulletin is that Mexico will remain sometime in March 2001, India will get even closer to the rest of the world, which will move to April 30, 2001.
After that, the state department will realize again that while there is increased demand, it's mostly from Mexico. USCIS will still not process all the applications it just received with PD of April 2001, so there will still be lack of demand. Therefore, I predict significant progress in PDs at least until the June 2006 bulletin. After that it may start retrogressing again as the demand levels will start to increase.
Good Luck to all of us.
Don't forget DOS guessed that EB2 would be retrogression for the rest of the world in April - Sept 2006. When that happens, you will see how the cut off date moves.