{accounts, mail, docs}.google.com (at least) have HSTS forced and preloaded in Chrome, but www.google.com does not.
http://blog.chromium.org/2011/06/new-chromium-security-featu...
as well as empirical Chrome behavior.
{accounts, mail, docs}.google.com (at least) have HSTS forced and preloaded in Chrome, but www.google.com does not.