You are correct in your common sense test, the article is not correct.
Check out the Concorde wiki[1] It states ~4.4K lbs for taxi which passes the common sense test. Taxi time is generaly planned as 15 minutes, so ~10K lbs/hr which is more than what a Boeing 767 burns at cruise - quite a lot! For comparison Concorde super sonic cruise fuel burn was 40K-55K lbs/hr.
For another reference Boeing 767s typically plan to burn 2K lbs of fuel for start-up/taxi/takeoff run.
Thank you for doing the research to find the numbers for this.
I think it's worth adding, as is reflected by your B767 ground movement figure that all jet engines are very inefficient at low power outputs, not just the Concorde's/supersonic aircraft. This is as a large amount of energy is needed to create sufficient compression to allow them to function.
Finding ways to minimize the amount of time spent in these states has been the industry's approach to date.
Check out the Concorde wiki[1] It states ~4.4K lbs for taxi which passes the common sense test. Taxi time is generaly planned as 15 minutes, so ~10K lbs/hr which is more than what a Boeing 767 burns at cruise - quite a lot! For comparison Concorde super sonic cruise fuel burn was 40K-55K lbs/hr.
For another reference Boeing 767s typically plan to burn 2K lbs of fuel for start-up/taxi/takeoff run.
[1] https://en.wikipedia.org/wiki/Concorde