Their numbers are arguably even more incomplete than ours because of the national shitshow of Boris Johnson bravado early on. Same thing started to happen in even Sweden until they tightened up, they decided on a similiar 'herd immunity let's get it over with' approach until the projected load became unmanageable.
Might help you to cross-reference with some place like Iceland:
Iceland Coronavirus: 1,760 Cases and 9 Deaths - Worldometer
They've tested about 12% of their total population and are running the most thorough testing in the world. Their numbers show 99% of cases are mild, and that only 1% of closed cases ended in death. Many of the countries with thorough testing are showing the same--though that might be a chicken-or-egg thing since that also means they have their shit together.
Italy in contrast took a huge beating for pretty obvious reasons.
I'd like to think our reaction outside of NYC has been more like Germany just minus testing (thanks to state government, no thanks to federal). We need to get there in short order and I don't think there's any way in hell we see those crazy high numbers unless everyone just lets loose right now or some of those loony anti-science governors elsewhere (SD, Florida) continue to do nothing, and that's coming from someone who has been pretty pessimistic so far.
But like you said, and everyone seems to agree, until we start getting better data, there's nothing actionable that's 'clear.' We're all just throwing darts on what's critical mass for public safety vs. what's critical mass for the economy and "hope" is a f***ing awful strategy. But IMO the longer we can hold out the better.