Consider me less than impressed. At elite competition levels where winners are determined by <s>doping/transfusion</s> hard work and micro-optimizations, sure. Mortals can worry about anything else.

Edit: According to this random site (https://cyclinglevel.com/cycling-times/40k-times), an elite rider can complete a 40k in 75 minutes. A 70 second reduction would be a savings of ~1.5%. Meanwhile, an intermediate rider should expect to run the same course in 88 minutes (~17% worse than the elite with hairy legs).