Problem with LVO is that they are remote visa office, because they are dealing with a lot of countries including UK, Scotland, all of Middle East, Pakistan etc. They can't complete Background checks personally. A number of agencies have to get involved in completing background, security & crimanaility checks. Each country has than it's own time to finish them off. LVO further process applications when they get the results back.
NDVO is only dealing India & Nepal, so basically they can visit physically, ring up different employers very easily, and can cross check with the info they already have.. We cannot compare LVO with NDVO.