That I quite agree, I seen an 70 years old man in the Lake District riding what appear to be a Planet X carbon bike with flat bar.
But at the same time, I can't help but think it would be suitable to buy a carbon hybrid, like this Sirrus whose frame look similar to their Roubaix model;
And for those who want to argue that you cannot ride as fast or efficiently with flat bars/risers that are higher than your saddle;
And for those who want to argue that you cannot ride as fast or efficiently with flat bars/risers that are higher than your saddle;
http://www.youtube.com/watch?v=_NMyaXG17Wg