ctccbc,
Good observations from someone not too far from where I tested. I am planning to get the wind extension and test that out next to my WH-2310, but I have had gust readings over 20 MPH at 7 ft with Atlas. I also noticed low rain readings by over .20 per inch compared to the 5in1 and the WH-2310, sometimes .30, but thought those may have been off in the heavy rains. The atlas was very close though to a Davis just a few blocks away, falling within a couple of hundredths.
It should be interesting to test the station in our hot humid weather to come, since a lot of the time this fall testing mine was done in the shade at peak heating, thanks to long shadows from trees around me. I always came in with a lower temperature in the daytime and higher at night than the 5 in 1 by 1-3 F. Whatever sensor chip is in Atlas seems to have a tighter range.
I also wanted to add that humidity is far superior with Atlas, than any other station I have tried. It's always in the middle of a ten % spread of other sensors, and maxes out at 100% when it should.