We have updated the API to version 1.20. We've changed what information is displayed for each level of details and introduced details=0. With details=0, you get most of the information from details=1 but 10 times faster! This make a big difference for API calls that return information about multiple screenshots, such as screenshot/list and screenshot/search. This is now default value for screenshot/create, screenshot/info, screenshot/list and screenshot/search.
Go take a look at the API documentation page, we have highlighted the changes there.