According to this website Netcraft there are 224,749,695 sites on the internet (March 2009). That’s ¼ of a billion. I’m not sure whether their figure means web servers or websites. If it is web servers you can multiply the number many times to find the number of websites on the internet as most websites are on a shared server. IFSQN.com is on a shared server along with dozens of other websites.
Anyway if you take it as websites (which is the lowest estimate) then if there are 224,749,695 websites on the internet and we are the 750,000 most popular then we are in the top 1%. Is that correct?