So, what DNS server do you use? I trust Google's DNS (I use the normal DNS ones, 8.8.8.8 and 8.8.4.4) a lot more than I trust Comcast's DNS servers. I'm sure there are others out there, of course, but 8.8.8.8 is good, reliable, and easily memorized.
Until then, I'll run my own stuff.
The chaos computer club runs their own, which happens to answer usually just as fast as Google’s DNS. (And which isn’t subject to censorship, Google’s DNS, like Comcast and most US ISPs, censor several domains of piracy websites, although the domains are still existing in the ICANN database, and are reachable through most other DNS servers)
You might as well use the Comcast ones.