For all of us who were wondering if the costly dietetic supplements were worth the investment, the answer is NO.
If we look exclusively at the recovery of energy - glycogen reserves - after sport, this study doesn't demonstrate any significant difference between isoenergetic sport supplements and fast food.
Does this mean you should go for your burger and fries after your typical weekly sport session ? No, of course, but I would just consider sticking to basic recipes, like a home-made isotonic drink - add sugar or honey, lemon and a bit of salt to your water - , or a beer.
Long story short, save your money for something else !