70%? Even AU and EU at 50% seems ridiculously high. That means that half or more of 3DS owners have WIFI in their homes, know how to configure it, and know how to find it on their 3DS. Awfully optimistic if you ask me.
I wonder exactly what their criteria is for "internet connectivity." For example, I walk into Starbucks with my 3DS in my pocket, since that's a Nintendo Zone, it just automatically connects, even in sleep mode, without me doing anything, as long as I have wireless on. Even if I never open that Nintendo Zone App, go to the Eshop, or update my system, does this count as "actively connecting" my system? The active part, being, I walked into the freakin' Starbucks with my 3DS?
I've heard that internet connection rates for PS3 and 360 are low...way below 50%, even now. I find it hard to swallow that 3DS owners are that much more saavy, unless we're all just techie early adopters.