If you guys check www.trackitt.com you guys can find the trend of approvals. You can search by name of the country, categories like EB2, EB3 etc... and also go to forum and get answers from all those people, who are on the same boat.

Also, check https://egov.uscis.gov/cris/jsps/ptimes.jsp  to find the current processing time and check http://travel.state.gov/visa/frvi/bulletin/bulletin_1360.html for visa bulletin.

This should help you to figure out all the answers you are looking for.