About half of my friend circle has had it in the last two weeks (and no, not because we're passing it to each other). There had been one case of Covid in the whole group the entire rest of the pandemic.

One case that you know of. Unless your entire friend circle has all been getting weekly tests since February 2020 it's likely that some have had asymptomatic infections. The CDC estimated that only about a quarter of infections were officially counted as "cases".

https://www.cdc.gov/coronavirus/2019-ncov/cases-updates/burd...

Odds of having it pass through a whole household without a trace would be lower, of course, but you are right that some of them/us may have had asymptomatic infections earlier on.

About half have had symptomatic infections, all from different sources (not due to us getting together), in the past couple weeks. Everyone in the house, even little kids, are getting sick (fever, at least, every time), in every single case so far (unless, again, some of us have had it pass through and no-one in the house had symptoms).

If that 1/4 symptomatic rate holds for omicron (I'm doubting it, but maybe) then something like 3-4% of the country's contracting it per day. Even if not, then it's still somewhere around 1%/day, minimum.

One thing I haven't seen data on is whether Omicron's milder symptoms also means that a higher percentage of infections are asymptomatic (and undetected).

Nobody in my family has had Covid yet, I’m really worried that will change with the new variant.

Yeah, it'd barely touched anyone I knew, family or friends. That changed really fast this month.