If you have betweem 80,000 to 100,000 ad views a day you would make that at $1 CPM. If you have 2 ads per page that is 40,000 to 50,000 page views a day. At that rate your charging .1 cents per ad view.
As for Sitepoint you have to take into the fact that the majority of ads are smaller and carry a much smaller price tag, plus it took a lot of hard work and effort to get ad rates that high.
CPM varies a lot according to uniqueness of your site and also according to how much traffic your site gets, how good your ad-rotator is, how targeted ythe sponsor's ads can be, what you know about your visitors (demographics) and much more...
That being said, the average CPM, for smallish sites ranges between 5-10$ middling sites, 15-25 and then up and up... I know a site that pulls in 110$ CPM (wouldn't I love to be them!!!)