That is growth rate as measured by confirmed cases. However given various restrictions on availability of testing, confirmed cases and real cases are likely to tell very different stories. Given that most countries refuse to test, refuse to test, hit an "oh shit moment" and start ramping up, the confirmed rate that your link uses measures testing more than actual infection rates.

References such as https://www.imperial.ac.uk/media/imperial-college/medicine/s... have used a doubling time of about 5 days. As https://www.statnews.com/2020/03/10/simple-math-alarming-ans... points out, studies of what happened in Wuhan suggest a real doubling time of about 6 days.

There are admittedly a lot of question marks about everyone's numbers.