I tried this, and verified through whatsmydns.net that my serving
domain is in fact pointed to my reference domain.
Serving: www.nerdwallet.com
Ref: fast.nerdwallet.com
However, the PSS still seems to be enabled. When I view my pages in
Firebug, the content is still being loaded from a Google IP address
(74.125.127.121), and the source still contains references to PSS.
Nothing in my DNS settings is pointing to ghs.google.com anymore, so I
don't know how this is possible.
I also tried changing my serving domain's A record back to the
original IP, rather than using a CNAME, and that didn't work either.
What am I missing? Thanks!