The magazines use AMCI for testing. I have talked to the guys who did the testing. I know them very well and they are MUCH more consistent than I would be and they use much more sophisticated equipment than the g-tech.
There are other variables such as temps, air density, altitude, and most importantly... surface grip..all of which will affect tested times from one magazine or driver to another.
There are other variables such as temps, air density, altitude, and most importantly... surface grip..all of which will affect tested times from one magazine or driver to another.