I ran a ping on that and arbitrarily killed it (Ctrl-C) midway through the 10th packet (causing received packet loss).

Most (all?) variants of ping take the -c flag which lets you specify in advance how many packets to send. Adjust the value to suit your own patience level. eg:

$ ping -n -c 5 66.39.54.27
PING 66.39.54.27 (66.39.54.27) 56(84) bytes of data.
64 bytes from 66.39.54.27: icmp_seq=1 ttl=57 time=92.0 ms
64 bytes from 66.39.54.27: icmp_seq=2 ttl=57 time=92.5 ms
64 bytes from 66.39.54.27: icmp_seq=3 ttl=57 time=92.8 ms
64 bytes from 66.39.54.27: icmp_seq=4 ttl=57 time=91.5 ms
64 bytes from 66.39.54.27: icmp_seq=5 ttl=57 time=91.8 ms

--- 66.39.54.27 ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 4005ms
rtt min/avg/max/mdev = 91.522/92.123/92.783/0.465 ms
$
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