Very much this. This is the results for my personal bread and butter, python and SQL. Workman tested very much mid-pack.
Other factors to consider would be time-to-learn, hot-key placement, device compatibility and general flexibility. I put my own Python code in your test and workman did much better. Be sure to use several samples when making a determination.
In most of my tests, Colemak was a consistent winner by a small margin.