Hi aqua,
They have been slow for the last 5 months doesn't mean they will be slow in the future. They would definitely speed up to catch up with their targets. If you look into the posts of New Delhi 2013 thread for the same month last year, i.e. June 2014, you would find that NDVO was working on Aug-Sep 2013 files and by the end of the year, i.e. December 2014 they were working on May-June 2014 files. Last year too they were slow for the first half of the year, but they did cover it up by speeding up later on.
I know we really cannot predict with NDVO, but I certainly feel they have targets which they have to achieve. Lets hope NDVO clears all the pending files and also continues to move ahead.
All the best.