Did you actually try this? I just searched for a Vancouver business, the name of which I'm not exactly sure of, to find the hours. The yellowpages site didn't find the business
at all but it was the
first result in Google with direct links to their website, a map, and the closing time was listed right in the search results. It turns out I did get the business name slightly wrong.
Ironically, the 4th link on the page was a link to that business on yellowpages.ca -- so they did have a listing but I couldn't find it by seaching there.
Google is the one tool to do everything and it does things more than well enough that sites like yellowpages.ca are pretty irrelevant.