Actually Norwegian parental leave is not that generous by the standards of similar countries. There is one year total of leave shared between mother and father (or other mother).
Germany has a much more restrictive system though. 65% and a cap that pretty much anyone with a college degree will hit. So in reality you look at 30-50% for most people. Still nice, especially given the job guarantee, but very restrictive in who can take it if you have bills to pay.
In my experience the Elterngeld usually replaces one income in a double income family. Of course one will "loose" money if the cap hits, but hey its 1800 EUR per month for up to 14 months just for being a parent. I think it is awesome even if it is just 30% of your regular salary.
The problem just is that it's often infeasible to replace the higher income. And since women in their early 30s are (unfortunately) often paid worse on average than men (due to many factors), women stay out longer and lose out even more.
On the other hand, in Norway you can get 100% up to a quite large maximum. As opposed to 80% capped at 1000SEK per day in Sweden.
Edit: Living in Norway is more expensive though. So a family of low income might not have been able to sustain themselves if the compensation was lower.