<br />55 to 73 is a huge delta. I can't see that just being a change in technique. Sounds more like you were not warmed up to the car/track in the morning more than any particular technique. I'd get warmed up in a session later in the day and then do a few flyers with hard braking, then a cool down, then a flyer or two with easier braking, then a cool down, and one last flyer with hard braking and then compare the speeds/times. If you start comparing your technique times from your first session to your last I think you'll draw some improper conclusions,. (IMHO of course.)<br />
I wouldn't have called it a "technique" change, but rather more of an epifany that the turn could handle more speed than I'd felt. That realization was precipitated by the earlier/lighter braking. I use the word FELT above, on purpose, as opposed to THOUGHT. Another change I made was to switch the secondary display on my G2X to MPH from some other random data channel. So, now I have "predictive lap time" and "MPH".
So, the evolution of the change was driven by:
1. A similar change I was already making in another corner for different reasons that gave me a better sense of what the car could handle.
2. Experimenting with applying that change to this corner
3. Having MPH available to see the immediate effect on speed, and predictive to see the ultimate benefit.
So, in essence I think you are right, it was more about warming up to the car/track. But, the warmup was more fundamental than limited to "that day"...but, was really me learning some new limits to the car that I previously didn't know.
I'm new. I've driven on a track at speed 5 times. Once in a 220HP turbo 1990 Miata; once in a rented SM; three times in my own car. This was my second time in my own car to drive this configuration. I still have lots of "fundamentals" to learn. Some come in great revalations like this one.