This article have missed to cover about low fee newbies used to put to save cost on payments leading unconfirmed transaction for many hours. That will make them panic about bitcoin and they will start blaming bitcoin network for it and some may even opt out from the idea of using bitcoin again. 
The op has tried and we have to give him thanks for this instead of looking for loops holes in his article. Were they transactions that were not conclusive? No matter how long it take the transactions are all confirmed, we only need to be a little patients with the system. Op thank you for your article for newbies.