said by WhatNow:
The main reason there are so few IPv6 connection is the only real choice the big US ISPs (telco and cable) offer to the general public is IPv4. The internet gains from IPv6 but it only an expense to the end user to replace end equipment.
That is true now, but over the remainder of this year and next year the situation will change dramatically as most of the major telcos and MSOs are doing various forms of testing and are about to move things forward.
It's part of the usual hardware refresh cycles. In the bigger picture it's a non issue.