"results are flexible as each wind tunnel is different and the one used for the testing was apparently geared more towards cars than trucks." No point in comparing results then, got it.
The drag coefficient of the Tesla Cybertruck has been independently tested in a wind tunnel and the resulting figure is measurably higher than the official one. The testing revealed that the Cybertruck experiences the least drag when it is in the low-height driving mode with both the tonneau cover and the trunk closed and the side mirrors removed.