Mmm. I thought the commentator on the Python quote rather missed the point: I think it is an out-and-out condemnation of the wine. The wind-up is "This is not a wine for drinking, this is a wine for laying down...", and the punchline "and avoiding!" reverses the meaning of that and avoiding. It isn't too good to drink now, it's too bad. But you knew that...

Shows how our views of Australian wine have changed, doesn't it?