Assuming that revolution means sidereal year, this discussion thread is speculating about how minute the changes in the sidereal year would be, and in what direction they would have been. I don't think there's confusion about the fact that the orders of magnitude larger change as discussed in the article is in the sidereal day, except perhaps for GGGGP's comment that started the thread.
>>>>> Wasn't the Earth's revolution on a different period back then too?
>>>> There is no force comparable to lunar tidal forces affecting the period of revolution
>>> But there are... The earth orbiting causes tiny tides on the sun [...] Over time, tidal drag will tend to make years longer.
>> Wouldn't tidal drag make years shorter?
> What's changing isn't that, it's the sidereal day.
>>>>> Wasn't the Earth's revolution on a different period back then too?
>>>> There is no force comparable to lunar tidal forces affecting the period of revolution
>>> But there are... The earth orbiting causes tiny tides on the sun [...] Over time, tidal drag will tend to make years longer.
>> Wouldn't tidal drag make years shorter?
> What's changing isn't that, it's the sidereal day.