I"m sure they can come across as egotistical and arrogant. I'm sure they're super competitive. Hell, they placed 6 in the olympics in 2008[1], and will probably row in 2012. These are kids that, yeah, they have been given a lot, but they also know how to compete. And rich to begin with. Thus probably arrogant as hell.

[1] http://sportsillustrated.cnn.com/2010/writers/jon_wertheim/1...