Hmmm. The diameter of Jupiter is more than 22 times earth's and a Jovian day is about 10 hours long. The moon otoh has a diameter 3.66 time smaller than earth's and a solar day of about 29.53 days. The earth was "despun" by the moon over the past several billion years, in fact, even today, the length of day increases by about 0.0015-0.0020 seconds per century.
I stand corrected. The article does not mention how quickly this planet rotates on it’s axis.