Hello,
Crawling through cases before and after your own case is an incorrect way. The cases were entered randomly, for example some of the RIR cases which had priority dates of early 2002 have cases numbers D-05014 or D-05011, what that means is on this dates the BEC guys entered the application in the new PBLS system. Since they are picking cases randomly there is no real way of figuring out.
Just wait and watch and some day you will be able to get some news about your case.
In my case, I have waited almost 4 years now, and just came to know that the BEC had lost my ETA forms, so they asked for that and now I have sent them filled out new ETA750 Form, so hopefully they will work on it and give some decision on it before they close this Backlog Center in Dallas.
Thanks