I ran the benchmark on a Teensy 2 and a Teensy 3 on Win7x64 and Win8x64. I no longer have XP boxes around...
I see virtually no difference between Win7/Win8 -- just between the 2.0 and 3.0 Teensy.
TEENSY 2.0 - Windows 7 x64
C:\temp\latency>latency_test COM5
port COM5 opened
waiting for...
