IanCP - 3:14 am on Dec 20, 2009 (gmt 0)

Numbers like that might not mean much unless nothing has changed on a site/page over the years

Ken, as you and others know I've changed nothing on my pages/sites of significance since 2002 excepting dumping 728 X 90 in favour of the single rectangle.

I agree with SJ, much of the changes come down to the definition of a "valid click". If this means the advertiser continues to get "value for money" for his/her costs and retains long term confidence in the system then that's fine by me.