I searched and couldn't find anything about another change in the guidelines back to 6 hour clearing. I think one person thinks that, tells someone, who tells someone else, then it's all over that "they went back to doing it some other way". When in reality nothing has changed.
But since there doesn't not seem to be a central clearing house for the latest methodologies, it's hard to make a definitive case. What I did find indicates that we wipe the board no more than once per day and measure snowfall at the peak depth before it compacts.