Where is a few miles outside of Loudon? Clarke County? That’s closer to WV than DC. And incredibly sparsely populated. Clarke is 85 people per square mile and Fauquier is 105. Fairfax County is 2,800.
Parts of Loudoun are very sparsely populated; indeed, it has the most unpaved roads of any county in VA. But since 1980, the population has grown from 60,000 to 385,000. Almost all of that growth has been in Dulles/Leesburg/Ashburn, etc. So in terms of percentage of households who have broadband access, the other parts of the county doesn’t have much of an impact on the overall number.