I agree with you. Just to make sure I'm not misunderstood - it's fairly common to generate ideas for rigorous testing from anecdotal evidence (preferably, more than one or two examples). Ultimately, this is a marathon, not a sprint, granted, so I wouldn't be remotely tempted to render judgement on the system based on a single trade (especially if it's still in the green and not exited), alas you can always trust me to come up with more ideas for you to test :)
Trader D