Sarah, it is my opinion from my gym work (not very effective given my liking for rum & coke!) that a 250ml glass of rum & coke, containing 50ml of rum, works out at about 100 calories (I cannot believe that anything could contain more sucrose than Coca Cola!), so 50ml of rum with 200ml of a glucose only soft drink would allow me to get intoxicated on 20% of the fructose I had previously.
Secondly, what's the problem? We've been consuming sucrose for 500 years, so why the big to do now? My mother used to make cakes with sucrose in them all the time. We never suffered kidney problems (Dad died from smoking 40 cigarettes per day, but that's another story!).
Thirdly, do you think, do you think, that industry could actually be ADDING fructose, just like the tobacco industry selecting for higher nicotine plants?