Google CKS Agent?

[leadegroot]

I just put up a new subdirectory of content, dropped a sitemap on Google Webmaster Tools and sat back and waited for the bots to crawl through.
MSNBot came through, Googlebot came through and then this morning this weird creature with an IP of 72.14.194.37 and a user agent of CKS and no referer came through.
Hitting several times a second, didn't look in robots.txt and the IP resolves to Google.
Anyone seen this? It was too fast to be human.
I don't like it when they do this. :(

[genem]

Yes, I've seen it too. What is it?

[graywolf]

It's the bot they use to check adwords landing pages. Might be associated with the new quality score.