LOL... Wow.. Your not the brightest bulb in the shed.. You know right im guy who forced Intel to admit there are still issues right, developing tests with pingplotter no one had done before ? You know im the guy quoted in press on this issue right https://www.theregister.co.uk/2016/12/03/intel_puma_chipset_firmware_fix/Im the guy in the class action lawsuit who did the tests, you know that right ? http://badmodems.com/Files/arriscomplaint.pdf
You know Intel has OFFICIALLY acknowledged there is still a issue with Puma 5/6/7 right https://www.dslreports.com/forum/r31122204-SB6190-Puma6-TCP-UDP-Network-Latency-Issue-Discussion~start=5788
Im not sure you could find anyone on the internet more versed on this issue besides me. WELL,, Its been a team effort of course with a core set of people on DSLR.
And NOOOO to answer your question, ONLY Intel modems have issues with .3.. I do all my testing at 0.05. 100 pings a second is a good temporal resolution. I have chart after chart showing modems going back 15 years that do this just fine..
Here im doing a direct A/B with a 14 YEAR OLD DOCSIS 2 modem at 0.1 THREE TIMES FASTER THEN .3. I swap modems in the middle of the graph.