As a rule, if you ever get a link to any page at ipv6.google.com :
1) If it works for you, don't worry about it.
2a) If it doesn't work, change it to www.google.com and try again.
2b) Maybe ask your IT department to provide IPv6 connectivity.
It's not hard to do. It will make their job easier in the
long run.
I will try to avoid sending ipv6 links ... but if I forget, you
now have a workaround.