They did do a lot of testing compared to other EU nations like the UK which was even slower to start testing. I too am puzzled by their very different figures and extensive testing seems to be the answer (500k tests per week) - the UK is still not testing in the community in contrast and is doing far fewer tests. This is the only major difference I can think of.

https://bgr.com/2020/03/26/coronavirus-testing-explains-germ...