I was a regular pioneer for many years and saw the creative ways some JWs counted their time and definitely not according to the official directives from the WTS.
Starting your time from when the you left your house
Starting your time from when when you left the service center
Rather than starting your time when you knocked on the first door, made your first phone call.
Ending your time when you walked through your door
Counting the time during the 45 minute to 1 hour coffee break
I have attended groups for telephone witnessing, 5 people, 1 phone, yet everyone counts their time. The other 4 chat and eat.
Calling a return visit who is never home and then driving across town to call on a return visit that is not home during the day.
Picking up your dry cleaning, laundry, children from school, doing some quick grocery shopping, and still counting time.
We had a thread on this and found that it is world wide, not regional, and even if on 50% do this, the numbers are bogus.