I've been on the internet since the word 'go' and frankly right now I couldn't use much more download speed. 15Mps is fast enough to get most of what I want in a perfectly assccpetable time.. I'd rather have more upload speed. When it takes minutes to send a 50Mbyte file to the lawyers....or upload it to my private 'cloud'
Even games - well the server I play against is the other side of a transatlantic pipe with 80ms delay on it. Doesn't matter how fast my local link is..