Pretty much so.
It looks like the post count uses a >= to not > than value.
If you had this in place since the beginning it would not be an issue today.

Like I said above you could try the content rebuilder but I am not sure if that would trigger the change for everyone. And if your site is very large it could take quite a while to finish.
Scratch this I just tried it it did not work.
Here is the best option to change everyone now.
Control Panel ยป Member Management
[+] Advanced Search Options
Member Post Count:set your option
Submit
When the list is built you can use the option at the bottom
Action: Change Groups
All Members or Selected Members?
"Perform Selected Action"
Then check the group under Add to.

Last edited by Ruben; 07/08/2009 1:56 PM. Reason: Added Comment

Blue Man Group
There is no such thing as stupid questions. Just stupid answers