Alexa traffic rankings bias?

I keep hearing about Alexa and how Alexa ranks websites. I checked it out today. My three most "successful" websites are ranked by Alexa. This blog is in the 5 million range (i.e. there are a bit over 5 million websites that get more traffic than this blog).What I found interesting is that my law firm site, redlichlaw.com, at #1,282,824, outranks our traffic court directory site, town-court.com,

Our traffic court directory continues to grow

I was stunned just now. Our traffic court directory has been growing. We're over 700 courts now. Lawyers in local courts come up to me and compliment me on the site. Seems like it's helping a lot of people.Traffic to the site has been growing, and I thought we would soon have a week with 3000 visitors. I checked our statistics today and we had nearly 4000 in the past 7 days. I checked it three