There a lot of sites that claim to give accurate traffic reports on different domain names, alexa.com is one of the main ones.
These traffic reports rely on people downloading their toolbar, the toolbar then reports back to the main site where you have been and this is how they rate the traffic for different sites.
A couple of weeks ago I downloaded alexas toolbar and used it for 24 hours, in alexas traffic report our stats changed from 10 page views per person to 38, the next day was 56 I believe, they use Yankee time and i downloaded and started using it halfway through the day, now we get like 4,000 unique visitors perday, yet with just me downloading the toolbar I could throw the stats like that.
So why not download the toolbar for a day and see how much we can change the stats, your avg and spyware wont like it as it is classed as a data miner cos it reports back, but tell your avg etc to ignore it for 24 hours, alexa is a few days behind in its reports so it will take a few days, but here you can view TeakDoor stats, and here you can download the toolbar.