@rbacal - excellent point ... you summarized what I was trying to get across quite nicely. Ad ad may pay well across the network as a whole, but for my demographic I believe some of those may actually not perform as well for my sites. So the only tool I have, is to block.
I guess this would be the automotive equivalent of saying that one type of tire (i.e.: AdSense using an across-the-network perspective) is the best for all cars? Nope. Some cars need rain tires. Others need snow tires. And some need racing slicks ;-)
This is where I'm not qualified to make any real judgements one way or the other - as I just started in January and am still serving up less than 1,000 impressions per day. So for that few page impressions, I'd prefer to have the high dollar clicks across all my ad blocks right now. Maybe when I'm serving up 50,000 impressions per day I'll consider dropping my competitive ad filter and seeing how it goes. Here's hoping that day comes soon! ;-)