You are correct , many antenna advertisements are false. Here is a example of what you see all over the internet , 150 mile Tv antennas , 150 mile Tv antennas are false advertisements. Solid Signal states this fact with bold red print. Here is what I say , if the antenna looks like a prop in a 1950's Si Fi movie , do not buy the antenna.
http://www.solidsignal.com/pview.asp...20Antennas&sk=