You say he is slow...but how are his call backs? Less than everyone else's on average? Is he maybe taking more time to BP the lawn and ensure problems are resolved vs others who may just be blasting the lawn and heading on town the road?
10% of your customers are 90% of the problem.
You may think the grass is GREENER on the other side, but if you take the time to water your own grass would be just as GREEN[/COLOR].