Originally Posted by
wphamilton
I'd take that bet

, as long as the added weight kept the same general balance.
I'd also be willing to bet that you could add say 200 grams on each of the derailleurs, then move them to the seat tube and stays, and you would see no difference is speed or handling.
Well the guys that have to make UCI weight (us this year) care a lot about where the weight is. And they say they can feel the difference. The Shimano Di2 battery moved from seat post to BB matters. Bolted on lead goes at the BB shell, or now popular screwed under the BB.
I know my 500g Brooks pro saddle was very noticeable over a lighter one. The pendulum effect can be felt.