Where's that ratio coming from? Shipping fonts is just good practice when you want your website to look consistently on all platform, it doesn't mean anything else about how the website is made.

Also, 100kbps is a very slow connection, it's 2 orders of magnitude less than the 10Mbps you talked about earlier, and when you have this kind of very poor connection everything is kind of slow anyway (even the very barebone HN's front page is 120kb!).