Extraced:
“For example, when the CBC made Canada’s Next Great Prime Minister TV show available on P2P networkings, DPI equipment delayed traffic so much that while some people received their broadcast within 2.5 hours, others were still waiting 10 hours later.”

That is not how DPI works. One of the principle that this article refers to ensuring Quality of Service (QoS). DPI’s can prioritize traffic, e.g. a Skype needs to receive priority over an email deliver and therefore receives bandwidth priority. This is simply, because everyone would complain about delays in a Skype conversation, but unlikely about an emailt hat takes 2 seconds longer to be delivered. It is bandwidth management and not delaying content for hours as it is described in the article. Whoever wrote it, obviously doesn’t understand the technology.