To make the statement that US cases are not growing exponentially based on testing data is ridiculous. At the King County press conference yesterday they clearly said that only about 250 people in the entire state of Washington have been tested so far. And that they have not tested any of the patients still inside of Life Care, any of the staff that works there, or their families, or any of the families that have visited their relatives there over the last month. The numbers of confirmed cases in the US are completely irrelevant right now as nobody is being tested yet.
Las Angeles had a press conference yesterday where they said 25 people have been tested so far in LA county.
Its seems like you did not read my post. I suggest to do that.
The conclusion I did draw that the information we have so far about the developments in the US as not looking exponential does NOT root on the cases tested or not tested.