CloudFlare's CEO says that free SSL will use SNI with ipv4 [1] and possibly non-SNI with ipv6 [2]. A CloudFlare engineer has discussed splitting the SSL handshake between servers so their many edge nodes don't need to keep customer secret keys in memory [3]. However, this sounds slightly different than the lazy loading behavior in the blog post.
Not sure why otterley was down voted. XP is going to exist for a while.
Old android/mobile clients are another case. Mobile operators are moving towards transparent "4 in 6" NAT/encap on their edges. The server would see a layer 3 IPv6 client, while the actual layer 7 client is an old Android/java stack.
[1] https://news.ycombinator.com/item?id=7910849
[2] https://twitter.com/eastdakota/status/478369486643658754
[3] http://www.slideshare.net/cloudflare/running-secure-server-s...