Meanwhile Belgium has nearly 50% dual-stack IPv6 deployed and there haven't really been any issues. It's configured well and works well. The vast majority of users probably hasn't even noticed.
Yeah, being from Belgium I can say that it is great. Makes it easy for me to test the IPv6 support on my servers.
The is one advantage of having an active duopoly [1] in the ISP market. Belgacom (38% market share) started migrating customers to dual stack in 2013. Telenet (40% market share) soon followed in 2014.
