During peak periods, certainly the vast majority of the traffic is residential, for obvious reasons. Businesses tend to no longer be in operation during evening periods.
As Shaw indicated, it's largely residential.
Off the top of my head, I don't have the split, but just to be clear, we have small-business Internet packages where there is no usage-based billing, and that's why this doesn't affect small businesses. As far as large enterprises are concerned, they have their own dedicated pipes or tunnels or channels, if you will. They buy massive amounts of bandwidth on separate networks, so to speak, and they buy what they need, and it's vast amounts.