Chapman - 9:41 pm on Feb 21, 2013 (gmt 0)
I use them as well - on about 1500 pages. They do look more "ad like" and my CPC for 1000 search/clicks averages out to about a dime. My CTR is extremely good though - actually, a bit scary!
Like netmeg, it's really just the search I'm interested in and the ads, which I haven't messed with much, just add to the revenue aggregate.