LinkShare reports on impressions - how often updated?

newbie: how long before impressions show up in reports?

[saoi_jp]

I tried contacting LinkShare through their online contact form, but after submitting, I get a 404 (!) so I'll ask here, in case anyone has advice.

I added LinkShare-generated banners to a set of pages about 10 hours ago. I had at least 2,500 visitors in that time (as reported by AdSense on the same pages). This is the first set of LinkShare ads that I've put up. I added the banners to the pages at about 11 PM east coast time, and as of 9 am there's no stats yet. Should I be concerned that my report shows 0 ad impressions?

I copied the ad code including the small image that is there for counting the stats. The only change I made to them was to substitute single quotes for double quotes.

[saoi_jp]

aparently the answer is 32 hours or so.