I am having the same trouble as some of the guys. Pings shoot through the roof and loss even to local mweb.co.za server. I had to actually restart the router just to get my internet back on but pings are still very irratic.
Mweb Guy are there currently issues? Here is the 20 pings to the mweb.co.za server.
Pinging mweb.co.za [196.2.63.110] with 32 bytes of data:
Reply from 196.2.63.110: bytes=32 time=59ms TTL=118
Reply from 196.2.63.110: bytes=32 time=126ms TTL=118
Reply from 196.2.63.110: bytes=32 time=74ms TTL=118
Reply from 196.2.63.110: bytes=32 time=55ms TTL=118
Reply from 196.2.63.110: bytes=32 time=258ms TTL=118
Reply from 196.2.63.110: bytes=32 time=84ms TTL=118
Reply from 196.2.63.110: bytes=32 time=300ms TTL=118
Reply from 196.2.63.110: bytes=32 time=107ms TTL=118
Reply from 196.2.63.110: bytes=32 time=51ms TTL=118
Reply from 196.2.63.110: bytes=32 time=257ms TTL=118
Reply from 196.2.63.110: bytes=32 time=193ms TTL=118
Reply from 196.2.63.110: bytes=32 time=145ms TTL=118
Reply from 196.2.63.110: bytes=32 time=96ms TTL=118
Reply from 196.2.63.110: bytes=32 time=572ms TTL=118
Reply from 196.2.63.110: bytes=32 time=256ms TTL=118
Reply from 196.2.63.110: bytes=32 time=80ms TTL=118
Reply from 196.2.63.110: bytes=32 time=110ms TTL=118
Reply from 196.2.63.110: bytes=32 time=235ms TTL=118
Reply from 196.2.63.110: bytes=32 time=137ms TTL=118
Reply from 196.2.63.110: bytes=32 time=150ms TTL=118
Ping statistics for 196.2.63.110:
Packets: Sent = 20, Received = 20, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 51ms, Maximum = 572ms, Average = 167ms
*EDIT*
It would seem something was maxing out my upload speed hence the irratic pings. Have tracked down the issue the varience is around 20-30ms now so no problem.

Regards
Hellhound