Sure you can quote stats all day, but it depends on your target audience. If you are running a tech website (such as HN/TC/Reddit/etc) you will see a HUGE portion of visitors using browsers like Chrome/Firefox and hardly any IE.
However if you are building websites that regular people use they still use XP and IE7... so much so that it can account for 10-30% of your website traffic.. It really pains me when HTML frameworks like Foundation 3.x drop support for IE7 and below because there is still the userbase there.
IE7/8 is not dead for most of the world yet. People who run statcounter websites are getting data from people who run their tools. I would trust if someone like Google Analytics released an average browser usage as they are more widely used. Who the F uses statcounter nowadays?
 Though you can do tricks/hacks to make it work for IE7.