The directness floored me the other way round — I came from a blunt culture to a very indirect one, where 'that's interesting' means 'no' and nobody says what they mean in the meeting. Decoding the politeness took me a year.
The way people disagree in meetings here floored me — blunt to the point I thought colleagues were angry, when it's just normal. Elsewhere I've heard it's the opposite, all indirect politeness you have to decode. The actual job I can do; it's the workplace culture that's the real learning curve. What blindsided you about how work works here?