I have just received an email from them to that effect, tried it, and lo and behold, indeed there is the ugly DNS hijack page.
The good news is that the opt-out is a more sensible registration based on cable modem MAC, rather than the deplorable "cookie method" we just saw from Bell in a recent slashdot story (http://rss.slashdot.org/~r/Slashdot/slashdot/~3/pzlZQFaBZBw/Bell-Starts-Hijacking-NX-Domain-Queries).
All you comcast customers and friends of comcast customers who want to get out of this, go to https://dns-opt-out.comcast.net/ to opt out.
Is there anything that can be done to stop (and reverse) this DNS breakage trend that the ISPs seem to be latching onto lately? Maybe the latest net neutrality bill (recently discussed on slashdot: http://rss.slashdot.org/~r/Slashdot/slashdot/~3/OuTwCeuF0MU/Network-Neutrality-Back-In-Congress-For-3rd-Time) will help?"