I agree that your method is better, and grabbing that first byte (or whatever) is more important. I just wanted to do something quick and dirty to give me an idea of total time. I figured getting in would be roughly the same time as getting out. I just needed to make *certain* that I can always run 115K baud on the hardware serial port (with no handshaking) using a PBP interrupt without worrying.

Of course, it turns out that I can.