Once again I will agree with Greendoc. If they are spray heads they will be putting down plenty of water. If they are Rotors then they are more than likely just wasting water because 10 minutes everyday is not doing a darn thing for the evapotranspiration rate. There are a lot of variables but most of the rotors apply around 3/4" per hour at head to head coverage and matched precipitation rate, and most do not have the matched PR.
If you want to you could PM me some info and I could come pretty close to telling you how much water they are putting out a time or you could get you some catch cans and check exactly.
If you know what you are doing then you can make these know it all customers realize they don't know chit. But getting them to do it is still a different story LOL