'Undue hesitation' is something else (eg: failing to enter a roundabout when there's a safe opportunity to do so, especially if this causes other road users to also be unable to enter the roundabout).
'Appropriate speed' is definitely a potential minor (or major) error on your driving test (and you are marked as failing for either a single major or three or more minors in the same category).
Generally, it's up to the examiner's discretion whether speed is 'appropriate', but often lenience will not be more than 10% of the speed limit (unless there are other factors, such as weather, road surface, visibility, etc. which would make it unsafe to travel at the posted speed limit).
'Appropriate speed' is definitely a potential minor (or major) error on your driving test (and you are marked as failing for either a single major or three or more minors in the same category).
Generally, it's up to the examiner's discretion whether speed is 'appropriate', but often lenience will not be more than 10% of the speed limit (unless there are other factors, such as weather, road surface, visibility, etc. which would make it unsafe to travel at the posted speed limit).