I think new evaps must be far more efficient. Ours is about 2 years old. In our current house we have evap for the first time, and it is working extremely well, far beyond my expectations. Don't know what the temp is, but cool enough that I have just turned it down as we were too cold, and we only had it on low anyway. Now it has clicked off, as it is on auto and just keeps ticking over. Electricity use extremely low. Turn it off when we go to bed, just have ceiling fans in the bedrooms and we have slept perfectly this week.
Just thought I would ad - I got the service guy out at the start of last summer to check it over and asked him for some tips on running it. You really do need to have windows / doors open and without this the humidity builds up. The wider the openings, the better it works and the cooler the room gets. Apparently the open window draws the air across the room. I open up all the blinds when the sun has gone down, so they aren't blocking the open windows. When I want to draw cool air into our bedroom, I open the windows as wide as I can. Seems counter intuitive, and I can hear my Dad's voice saying 'we are not cooling the garden, shut that door', but honestly, the aircon draws barely any electricity - far less than our reverse cycle did (with all doors and windows shut).