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 â€œwe did it the Agile way!!!!â€ success messages after the project you executed took production offline, took twice as long to finish and cost 3 times as much.