The time to get results on Google AdWords depends on many factors. Are we starting from scratch or are we going to work on a new account? Do we need new landing pages or will the current ones make do?
If the account is relatively new and we are starting from scratch then lets at least give campaigns two months time to get any results. The account will need more work in the setup phase like installing conversion codes, linking to analytics account, finding keywords and more.
If the account is already set up with conversion codes and receiving conversions then in most cases our job is to improve upon the results or keep them at the same level. In such cases, we ask to give us around about 25 days to 30 days to see any results.
These are ballpark figures, and it is best that you call up our rep for an opinion on any specific project.