The Boeing procedure is to continue the takeoff. Rotate at the 2000' remaining point regardless of airspeed. This has been the procedure we have taught at both UPS and Delta on the 737/757/767/747-400/777 fleets. With today's wx radar and predictive wind-shear systems it would be rare to be surprised by wind-shear. The crew probably would have made allowances for wind-shear advisories(i.e increased rotation speed based on RATOW, max thrust, different runway etc.). The key to the question is that you are above V1.