https://www.cnet.com/news/testing-verizons-new-5g-speeds-exposed-three-major-issues-with-the-next-gen-data-network/

At times, the 5G speeds recorded by the Speedtest.net benchmarking test got us the 600-plus megabits per second download speeds Verizon has promised. Other times it was closer to 200Mbps, and still other times, the phone professed to be on 5G, but acted a lot like 4G. I had a battalion of upload and download tests I was going to try Thursday in downtown Chicago, but it was so hard to keep a 5G connection long enough to run the most basic tests, I had to throw those plans out the window. 

Verizon and Motorola are well aware of these issues. I spent hours with PR reps from both companies, and kept in close contact with them throughout the day. They both acknowledged the start-up issues and said that engineers were following up with trouble locations.