Or is it this one? Welcome!
The first one has an earlier start time, and a lower thread number (2 vs 7), so I would say that was it. Certainly it is the first thread that is actually a comment on Cecil’s column.
However, the actual thread #1 is this one, and is in the Comments forum. It is possible that its start time was scrambled after the switch to vBulletin.
How is that even possible?
Don’t ask me. But either its start time or post number must have been changed somehow.