Didn't Webb run ads in the primary?
Webb had one radio ad and that's it - no TV ads. Miller had a full-scale radio & tv ad campaign and Allen has been airing TV ads since Memorial Day.
So, I should not have said no ads "at all" as I just looked it up to be sure and Webb did air a radio ad just before the election. However, there were a number of commentaries before the primary with regard to whether Webb's reliance on the "netroots" and print media for his campaign would prevail over Miller's traditional R/TV ad campaign.