rats arent just BIG mice..
and the author is a moron.. LOL
mice FAR out smell rats.. however with that being said.. you could have a 1.6 cage cage that hasnt been cleaned in a week and it would make your toes curl.. its that smelly..
the key to odor free rodents is CLEAN CLEAN CLEAN!!.. i clean my animals every 4 days if they need it or not.. and its a good rule of thumb to stick with.. my animals always have clean bedding, and the ammonia in the urine never builds up to a level that will make them sick..
the smell from rodents doesnt come for them "dumps" as you put it.. it comes from their URINE. No piss.. no smell 
dwarf hamsters are odorless to the max.. i had a cage i didnt clean for 6 months and it was clean and odor free for the most part.. spot cleaning in the key to dwarf hamster cages..
best of luck
dan