Could it be because Casino is from France, the nation most closely associated with epicureans, that their food products take on a luxury air?   Casino goes all out on this one, part of their Delices range.  They're offering a dark, dark chocolate, at 85% cocoa solids, with cacao sourced from Tanzania, and filled with 10% split almonds, an ambitious undertaking indeed.  

Green & Black's and Carrefour did quite acceptable jobs with their 80%+ bars. The reason you don't see many 80%+ bars on the shelves, especially among mainstream producers, is that they're not easy to pull off.  The darker the chocolate, the more important the cacao that's been sourced and the manufacturer's chocolate producing techniques in dealing with the higher expected bitterness.  Here's a analogy that could better explain it.  The quality and freshness of fish stands is more evident when that fish is eaten as sashimi.  Served as a fried fish filet sandwich at McDonald's and drenched in cheese, it's not so easy to discern -- or all that important -- what grade dish you're eating.

Green & Black's makes a better 85% bar than Casino, but bear in mind that Green & Black's is a specialty chocolate producer.  Casino is not.  Were Michael Jordan to golf against Tiger Woods, we would expect golf pro Woods to win.  If Woods only won by a small margin, we'd probably be more impressed with Jordan.      

Casino is doing something right with this dark French chocolate bar.  They're delivering an intensely dark bar without it being overly bitter and softening it with the addition of a few split almonds.  I've noticed that fillings in Casino bars aren't gimmicks.  The fillings are added in small percentages to better balance the bar and make it more palatable to a wider market.  Certainly, my wife would qualify in that wider market. She wouldn't bite into an 85% bar unless it had something like almonds in it.  Making them split almonds and writing French text on the front and back wrapper makes any foodie who was once obsessed with Grey Goose's French pedigree succumb.

And at these low prices, even Ritter Sport addicts can finally give up their addiction and have a real shot at being gourmets.