Let him bark!
You made a conscious decision to optimize the airplane's performance based on real-time conditions. Apparently you were light enough that you could attain BOTH altitude and airspeed in the gusty (i.e., potential windshear) conditions.
If you did not explicitly violate your FHB or regulations, do something unsafe for your airplane/configuration, or exceed some limitation, you appear to have made a reasonable decision. That is what you're paid to do!
OTOH, the check airman is paid to ensure you know "the book" and "do it by the book." If you made a conscious decision to deviate (even by a small amount) from the strict procedures, you owe it to him to brief it in advance (e.g., "Gusts are strong enough to indicate possible windshear. I'm going to use procedures for forecast windshear [full thrust and increased VR], rotate initially to 15 deg max, and take any increase in airspeed above the normal V2+10 until 1500 AGL. Flap limit speed should not be a factor."). Then he can squawk all he wants about it, but you used your PIC authority to adjust the procedures for the conditions, and can justify any minor deviations from "book numbers."