This page has a few pcap-traces and tcptrace plots done with ns-3-nsc and the ns-3 tcp-large-transfer example scenario. The trace files are those from the senders network interface.
This was done using the official ns-3-dev tree dated May 29th, 2008 with ns-3s own TCP implementation (trace).
This was done using NSCs FreeBSD 5.3 stack (trace). Note that the simulated FreeBSD connection takes about twice the time to complete vs. ns-3s TCP model.
Again the same scenario, this time using NSCs Linux 2.6.18 stack (trace).
Linux 2.6.26-rc6. (trace).
... and again, with NSCs OpenBSD 3.5 stack. (trace).