http://wwp.greenwichmeantime.com/
By the way, latency does not affect the time readings as this is compensated for via packet stamping. (even that is just milliseconds anyway) You can be certain that you will see a consistent and accurate time reading at the above site.
As someone explained, the TRF clock simply displays the time setting of your local machine. If you set the time sync setting on your PC to time.nist.gov, it will be almost perfectly accurate to the above site, at least at the time of sync. PCs are notoriously bad clocks and lose or gain time very quickly.