In Canada it used to be 24hrs, but there is now a 4-5 day waiting period to get results after you get swabbed or blood tested, due to a large backlog of tests.

So most results we see today are about ~9-10 days old if we combine that with “when did first symptoms appear?” survey in the Chinese study (results were often 5-10 days before visiting the hospital when the tests are first initiated). Then on top of that some people take up to 5 days to show the first symptom.

So any data you see today could easily be 2 weeks old. 1 week would be an ideal target in the short term, depending on where your goalposts are...