Hi,
latency to one site is about 170 ms (Hamburg -> Chennai, India)
latency to another site is about 222 ms (Hamburg -> Chile, south america)
replication to vcloud air is working fine, latency is about 125 ms..
Currently I am waiting for the network guys to allow NTP Traffic to one single NTP server.
Then all replication appliances will use the same NTP Server..
Let´s see if this helps while waiting for the vmware support..