Fibre cuts the Mediterranean were reported on December 18th 2009. We decided to have a look at the impact on ping performance using the PingER data.
Losses
The effects on the losses seen from N. America (SLAC in California) to N. Africa (Egypt, Sudan); Middle East (Bahrein, Palestine, UAE, Oman, Jordan, Lebanon, Saudia Arabia); S. Asia (Sri Lanka, Maldives, Pakistan) are huge. As seen from PingER daily loss data measured from SLAC, comparing the losses on Friday Dec 19 with those on Mon-Thu (15-18 Dec) the losses have increased by a factor of 5 to 30 times for most of the hosts monitored in the above countries.
For performance issues following the previous Mediterranean fibre cut see:
https://confluence.slac.stanford.edu/display/IEPM/Effects+of+Fibre+Outage+through+Mediterranean
RTT
An example of the increase in RTT can be seen below in the plot of RTT seen from SLAC to a node in Egypt. The sudden change in RTT from ~ 244ms to almost 400ms can be seen around 9-10am. 
Another view of the effect of the RTT increases is seen in the plot below of the median RTTs measured (thed error bars are the 25% and 75%-tiles) from 3 monitoring hosts in Pakistan (NUST, COMSATS and NCP) to FNAL and SLAC (i.e. 6 pairs of monitor/remote hosts) for the first 19 days of December 2008. 