For the love of god, speed is not the issue with 5G (or frankly LTE either), it's coverage. I'm on T-Mobile, which has the widest 5G coverage and I'm very often getting middling service because the reception just isn't great.
I can easily get 500-700Mbps downloads and 100Mbps uploads when my signal is better, I just need better signal more often.
https://www.wsj.com/articles/5g-future-mobile-internet-309dac2b?mod=djemalertNEWS