It's very well possible that Carol is misinformed about that being the reason the show was shot in advance. If that picture is indeed from the episode in question, I have a hard time believing they'd still be shooting live in 1972 or '74, which according to IMDb, is when the Carol and Liz non-All Stars weeks aired.
Was this really worth the pissing match this devolved into? Jesus Christ.
The point is this: if it comes down to Carol misremembering, then that's fine. But I don't consider the knee-jerk remarks of someone who takes far too much at face value to be the definitive source on whether or not a certain incident happened on a certain date. If it was someone with a little bit more reputablity, I doubt I or anyone else would've come down in that manner.
If Vahan is right after all, then I shall apologize. But at the same time, I think citing Wikia as your source (unless the person cites where he received the info from) is not the best way to start and I doubt that I would be the only one who feels that way.
I'll at least withdraw the "fanboy" statement, free of charge. That was a little much.