dslreports.com/archive doesn't lie. People buy what they buy. If they want faster speeds they can easily get them for only a few dollars more than the tiers they're on.
Unless you can prove otherwise.
We have 50Mbps Fios and 15Mbps cable available.
A survey of 23 neighbors reveals that most choose to buy 768K (now 1M) DSL or 1.5Mbps cable modems. Two have 10M Fios. We have 768K cable, chosen to save money ($27/mo).
DSLR forum members are mostly power users, not exactly representative of the average American demographic. Most households are NOT purchasing the maximum speed available.