I found this posting to be a bit swear-y (you’ve been warned), but otherwise on the money.
The final paragraph nails it (I have definitely seen my share of those ‘success’ messages:
Above all else, have a wonderful holiday season and give your teams a break until the code freeze is lifted in mid-January. Then you can get back to shoving Agile on people, making them work 60 hours a week again and then having your directors send “we did it the Agile way!!!!” success messages after the project you executed took production offline, took twice as long to finish and cost 3 times as much.