[trotsky]

I saw traffic numbers $HUGE_ISP last year and google was pulling almost 85% in search. That was by number of bits shifted, not impressions - I'm not sure how that would change it.

If you're really interested, I'd reach out to sandvine. They are on net at several majors and they gather tons of information and are allowed to share it. They might take some time out from writing breathless press releases about netflix traffic to kick you some numbers, all good publicity. I think volume on a large national ISP is likely to be a much better metric than trackers.