Asthma, did you have a vertical or horizontal spot? The reason I ask is because getting 4000/day from a single horizontal spot is nearly impossible. However, it would be totally possible for the vertical spot. I'm in contact with their ad company (cybercat) and I was told that the horizontal advertisers usually receive 150/day on the low side and 3000/day on the high side. It seems odd that they would UNDER-estimate the traffic, if you were referring to a single horiz. spot.
From my own experience, I receive 2000/day from my horizontal spot. The traffic is stellar and I convert it at 1:200. What can I say, my site rocks
LOL!
Cassie