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The improvement in the PingER IPDV between SLAC and NCP (moved to TEIN3) and SLAC and PERN (not moved to TEIN3) can be seen in the plot below. It is seen that both have improved with time, though the improvement for NCP is much more dramatic. Both are now small and comparable and < 2 ms.
The derived throughput has improved by a factor of 5 since the start of 2008, however this does not appear to be directly correlated with the move to TEIN3.
Pakikstani Universities seen from PCP Islamabad
South Asia TEIN3 hosts seen from NCP Islamabad
Looking at the Inter Packet Delay Variability from inside Pakistan (from the PingER NCP monitoring host at the Quaid-e-Azam University in Islamabad) to South Asian hosts connected via TEIN3, we see the plot below. It is seen that there are dramatic changes in the IPDV for the University of Peshawar. The interconnections between the Pakistani hosts probably do not use TEIN3 and so the improvements seen for Peshawar, SIRSYED and UET are probably independent of the TEIN3 link.
On the other hand if we look at IPDV from NCP to the TEIN3 hosts in Sri Lanka and India we can see the dramatic improvment in October 2008 for India and Sri Lanka. Unfortunately NCP was not monitoring the PERN host.
See the spreadsheet for more details.