Quite the discussion on this subject so I will spew my 2 cents about the subject.
Lets be honest the Davis tipping bucket rain gauge is inconsistant, I threw mine in the trash a few years ago and have had a Rainwise which is not only more accurate as well as cheaper than a Davis with my Vantage Pro 2, I wouldn't go back. Had a deluge yesterday with Pro 2 console showing high rain rate of 6.62", this am my manual gauge showed 0.75" and the Rainwise recorded 0.76", even in steady, light rains the gauges don't differ more than a couple 0.02".
I can just guess at the problem with Davis tippers from the smaller collection area, different tipping bucket shape than most quality tipping gauges.
Lots of mention sometimes of water loss with high rain rates which is true however I don't think there's a tipping bucket that all the water actually flows out of the bucket when tipped, surface friction, dirt etc can make water stick which increases the weight of the bucket and more water needed to tip the elevated bucket. Maybe that's one reason Novalynx says the 6" hour rate for calibration gives good overall results along with most of the time rainfall rates are higher than 1-2" an hour across the country.
When I got my Rainwise I called Rainwise and spoke to Lonnie White about the accuracy. He told me they calibrate their gauges which are 8" using 8 ml per tip which is very close to Novalynx's 7.95 ml per tip for 2" hr rain rate for 8" diameter.
I would trust what Novalynx manual says, it's about the same as what Rainwise does to calibrate their gauges which perform great.
Did Davis release anything to back up their claim about the new Aerocone improving rain gauge accuracy in wind ? Or likely just another company trying to improve their bottom line by sucking in customers with no hard data to back up their claim.