yes it does, net neutrality not only has to do with the ISP but also the services. different useragent string should NOT lead to a worse quality of service.

I bet the advertiser doesn’t know English (probably a Chinese manufacturer) and thought the end of every word is the unit (like for x and p)

Seeing it written as MBit/s feels so wrong to me, I read it as MB/s at first then I realized it’s Mb/s.

I still remember when 150KiB/s was what we had as a child. It was very usable for the small amounts of data we needed back then.