Pinging your hub doesn't automatically equate to mass traffic. You may get a little.
Pinging is simply a way for you to alert all search engines that you've got a new piece of content you just published, and you'd like for it to get indexed more quickly.
Believe it or not, your content does not automatically show on Google as soon as you publish it.
You can find this out by going to the Google search bar (not the browser part) and typing in the following command:
Site:Your Hubpages URL.
For example, if we take Darren Rowse's blog URL you would do this:
When you hit enter, you'll see either one of two things:
1) The actual result of what your hubpage would look like on the search engines (your site has been indexed)
2) Nothing. No results at all. (site not yet indexed)
It usually takes about 1 to 3 days to get a hubpage indexed on the search engine. Once it's indexed, it's easier for you to start throwing backlinks on it and getting it to climb the ranks.
Even though you can see the hub and certain people with your URL can see the hub, that doesn't mean it's yet available in the index on Google.
It's kind of like a library book. A brand new book comes into the library. People in the know get to it first. But not everyone int he library will know it's available until put into the index cards.