Not enough to fail on that, if you made the lorry slow or change direction it could have been a fail, the fact you sped up probably worked in your favour.
The examiners don't send the licences and counterpart back, they dispose of them, and just file their forms.
People on test, inveribly think an error is worse than it is, when in reality its nothing more than a minor annoyance, if at all annoying to other road users.
The examiners aren't looking for a perfect drive, just a safe competent drive, you wouldn't have passed if the examiner though you put yourself in a dangerous situation.
I'd file it in 'I passed, that's all that matters' don't try to critique your test, its already been done by someone a hundred times more experienced than you