My Q80T did over 80mbps wired, so it sounds like the cheaper models get shafted indeed. Could perhaps be something with the SoC, it might not be fast enough to handle fast data transfers?
Nah, not SoC related, 100Mbps can be done on just about any old single core Corex-A7 or A5 even. Gigabit is a different matter, then you might need a bit more oomph, but not a lot.
From experience, I know it requires software tuning on almost all SoCs and this is really pathetic by the TV manufacturers.
In your case, you've spent north of $1,000 on your TV and it can't even do 100Mbps line speed, I mean
Most of these TV's should have a quad core Cortex-A53 or better SoC in them and adding something like Gigabit Ethernet would add all of $1 to the BOM cost, maybe even less for someone like Samsung. Doing proper driver tuning can't be that hard, I mean, it can be done in Linux and all these TV OSes are derived from Linux in some way.
Even a bog standards chip from someone like AllWinner on a Chinese Pi board can do Gigabit at 900Mbps+ over Ethernet with a tiny bit of tuning, so why can't a $1,000+ TV?
This really irks me...
And we're WAY off topic...
Edit: Well, I guess the built in Ethernet is faster than in the Netflix app, but still a huge disappointment. Oddly enough, the upload speed is just fine...