Do our American Colleagues have a Greater Passion for Work?

I was listening to an IBM internal Podcast this morning, produced by some of my American colleagues. It was introduced with fanfare and a lot of casual banter. There was a lot of excitement and phrases such as ‘let’s kick butt’. It got me to thinking - do our American friends have a greater passion for their work? Not just a more lively personality - they actually care more about their work and want to make cool stuff happen? As a rule, I hate generalisations. But it seems this might be true.