Is A/C working normally?

My customers would laugh in my face if I told them that a 20 degree difference is good! lmao Especially when its 110 outside! I'm sorry but if the air blowing out of the dash vents is 90 degrees something is wrong!
When I lived down there in the AZ oven I converted a Ford Ranger over to 134. With the Spal fan turned off that was in front of the condensor I was lucky to see 55* on a hot day at idle, with it running I would see 35* or so. Just charged a neighbors truck, it was 70* ambient and 35* in the vent......

If I remember right on our house a/c (heat pump) 20* temp drop was outstanding.