I switched to Comodo DNS about a month ago and it was fast. Lately my computer would just hang and never connect to a lot of web pages.
Today I was going to dig into my computer and see what the problems is…BUT
I switched back to my old DNS settings and wow, speed again.
I found and used namebench-1.3.1-Windows and am using the recommended Name-Servers from the scan it performed on my computer and router settings - much faster and they did NOT even mention COMODO DNS Name-Servers!
Perhaps COMODO needs to tout their blacklists offering as opposed to the speed and errors that are mentioned to things like notations on their results page of Google.com being highjacked, and some others that were notated that they were incorrect referenced for certain Names.