Are wordtracker and overture daily traffic accurate?
 

I got the number one position in Google for 3 terms with supposedly 5,000+ visitors a day.

11,969.0 /day icuii activation code
4,081.0 /day tomtom full serial number and activation code
4,176.0 /day microsoft office 2003 serial

However, my logs only show 10 or 15 daily visits.

Do the numbers reported by overture and wordtracker cover a year?

The difference between my traffic and their reported numbers is huge!!!