Short answer is yes changing your dns to something that's actually working
will increase response time from the internet. Does comcast assig you a
static dns and ip? Sorry I am not familiar with their setups.

Jim
On Apr 19, 2011 8:59 PM, "Cary Preston" <[email protected]> wrote:
> I had been having a ton of problems with my home network. Multiple calls
to
> Comcast resulted in little more than missed time from work. I replaced my
> router (Time Capsule) but my iMac was still having wireless issues- even
my
> iGoogle home page would time out. Just on a hunch I changed my DNS from
> Comcast to Google- and the change was profound. Before I rebooted iTunes
was
> timing out during app updates, now everything is just screaming fast. Is
it
> possible that such a simple change could have so much effect on my network
> speed?
>
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