I was agreeing with you, I just was saying that it was the U.S. which often lagged in cell phone standards adoption, so if the U.S. has great conectivity, and even South America has good connections (I have a slower connection but it's at least 1 mbps, more than enough for a CRUD app !!! ), where do they need that cache? Africa? And I've read that they have pretty decent cellphone infrastructure there, having bypassed landlines entirely, so maybe not even there.

Summary: with good cellphone connections everywhere, one of the points is not as strong. There still are dead spots, but enough to warrant the extra complexity of sync?