Have you tried pinging the tv site via the command line instead of using the speedtest.net figure as a guide?
You can get multiple results instead of a one off.
ping [the address of the simply tv site] -n 10 will give you 10 results...
[edit]
This is what I get:
Code:
[cobbydaler@goldmund ~]$ ping -c 20 www.simplyglobal.tv
PING www.simplyglobal.tv (212.78.86.26) 56(84) bytes of data.
64 bytes from simplytv.co.uk (212.78.86.26): icmp_seq=1 ttl=117 time=20.0 ms
64 bytes from simplytv.co.uk (212.78.86.26): icmp_seq=2 ttl=117 time=20.4 ms
64 bytes from simplytv.co.uk (212.78.86.26): icmp_seq=3 ttl=117 time=20.1 ms
64 bytes from simplytv.co.uk (212.78.86.26): icmp_seq=4 ttl=117 time=19.6 ms
64 bytes from simplytv.co.uk (212.78.86.26): icmp_seq=5 ttl=117 time=20.3 ms
64 bytes from simplytv.co.uk (212.78.86.26): icmp_seq=6 ttl=117 time=20.8 ms
64 bytes from simplytv.co.uk (212.78.86.26): icmp_seq=7 ttl=117 time=21.1 ms
64 bytes from simplytv.co.uk (212.78.86.26): icmp_seq=8 ttl=117 time=19.4 ms
64 bytes from simplytv.co.uk (212.78.86.26): icmp_seq=9 ttl=117 time=20.3 ms
64 bytes from simplytv.co.uk (212.78.86.26): icmp_seq=10 ttl=117 time=20.3 ms
64 bytes from simplytv.co.uk (212.78.86.26): icmp_seq=11 ttl=117 time=19.9 ms
64 bytes from simplytv.co.uk (212.78.86.26): icmp_seq=12 ttl=117 time=20.0 ms
64 bytes from simplytv.co.uk (212.78.86.26): icmp_seq=13 ttl=117 time=19.9 ms
64 bytes from simplytv.co.uk (212.78.86.26): icmp_seq=14 ttl=117 time=23.0 ms
64 bytes from simplytv.co.uk (212.78.86.26): icmp_seq=15 ttl=117 time=20.3 ms
64 bytes from simplytv.co.uk (212.78.86.26): icmp_seq=16 ttl=117 time=19.2 ms
64 bytes from simplytv.co.uk (212.78.86.26): icmp_seq=17 ttl=117 time=23.2 ms
64 bytes from simplytv.co.uk (212.78.86.26): icmp_seq=18 ttl=117 time=21.9 ms
64 bytes from simplytv.co.uk (212.78.86.26): icmp_seq=19 ttl=117 time=20.4 ms
64 bytes from simplytv.co.uk (212.78.86.26): icmp_seq=20 ttl=117 time=20.1 ms
--- www.simplyglobal.tv ping statistics ---
20 packets transmitted, 20 received, 0% packet loss, time 19002ms
rtt min/avg/max/mdev = 19.299/20.570/23.296/1.054 ms