We noticed increased latency on routes to Betfair recently.
On querying with Betfair they confirmed that an extra hop is taking place via a third party to filter traffic via a DDOS service.
So we thought you should be aware if you are seeing an increase in ping times.
Betfair have posted on their own forum: -
http://forum.bdp.betfair.com/showthread.php?t=2825