The Jante Law is both good and bad, in my opinion. You could say that the older generation (like my grandparents), act according to it more often than the younger ones do, but it's still there. The younger generation are more individualistic than the one previously, but are generally still rather humble about their successes (I'd like to think).
In the group of friends I consider to be my main posse, there are both rather poor (like me, unemployed ) and proper rich. The difference might be that they have an apartment downtown, or take the boat out sometimes. But that doesn't bother me in the least, that's their life and I have mine. We are still very good friends and they both look and speak the same way I do so you couldnt spot the rich kids from the poor at a glance. Maybe I live in the sweet-spot, but its a way of life I like. Of course, there are those who really pimp their self out to show their wealth, but I reckon the "gap" is narrower than in for example USA (has much to do with the political system as well, we're almost commies compared to you )
The kind of music is more important for a kid these days than the money you make or the success you have in life...
The bad thing about the Jante law is that building a successful company could be frown upon by certain people, and I think that is very sad. Sweden need new businesses to function and we got the knowledge to do some rather amazing things, just get to it already!