I've been seeing more and more pressure to support IPv6 in the various SaaS companies I've worked at. I do think it's happening.
That said I tend to think LANs and VPCs will continue to use IPv4 internally for decades even if the load balancer does IPv6.
I'm at a home connection from a normal provider on brasil (third world country) and my router assigns a public ipv6 for each connection. I think all big providers have ipv6 enabled by default over here.
Do they also provide an IPv4 address? If not, have you run into any problems with sites that don't yet support IPv6?
It's interesting that the number fluctuates so much every weekend. I guess it's caused by people accessing the Internet from home instead of from the office. It's more than I expected.