I've been getting inconsistent speeds and packet loss for weeks. Tech support blame my firewall/router/every other piece of kit that’s mine and not theirs.
Code:
2nd 512K took 937 ms = 546.4 KB/sec, approx 4502 Kbps, 4.4 Mbps
3rd 512K took 2203 ms = 232.4 KB/sec, approx 1915 Kbps, 1.87 Mbps
Ping statistics for 212.58.224.131:
Packets: Sent = 22, Received = 15, Lost = 7 (31% loss),
Approximate round trip times in milli-seconds:
Minimum = 17ms, Maximum = 29ms, Average = 21ms
I too have been thinking about downgrading to 2MB but judging by your experience I would be wasting my time.